# why does the equation x^2=-9 has no real solution why does the equation x^2 = 9 has two solutions

56,329 questions, page 75-
## Algebra 2

1.What is the vertex from the equation? Y=x^2+12x=4 (Please show your work to show me the steps to get to the right answer.) 2. Use the quadratic formula to solve the equation. x^2-7x-6=0 (Please show your work to show me the steps to get to the right

*asked by Sam on November 27, 2018* -
## Math - algebraish

hey how do we convert y=mx+b to standard form? the standard form of the equation of a straight line is usually considered to take this form Ax + By = C, where A,B, and C are integers and A is positive. So if your equation is in the slope-yintercept form

*asked by gorden on April 9, 2007* -
## URGENT ALGEBRA 2

identify the vertex and the axis of symmetry of the graph for the function y=3(x+2)^2 a.vertex(2,-3 axis of symmetry x=2 b.vertex(-2,-3) axis of symmetry x=-2 c.vertex(2,3) axis of symmetry x=2 d.vertex(-2,3) axis of symmetry x=-2 identify the maximum or

*asked by ray on October 4, 2013* -
## Algebra 1

Two students are absent. This is 1/8 of the entire class. How many students are in the entire class? Write the equation: How would you write an equation?

*asked by Bob on January 22, 2014* -
## algebra

4)Write the equation x^2-2x+y^2+4y=11 in standard form. answer= (x-1)^2+(y+2)^2=16 5)Write the equation 4x^2+24x-y+34=0 in standard form answer= y= 4(x-3)^2+2

*asked by Marissa on August 21, 2007* -
## Math

These are two equations: 1)y=|x|-3 2)y=|x|+3 a. Which equation translates the parent graph _ units up? b. Which equation translates the parent graph _ units down?

*asked by Angie on March 26, 2009* -
## Algebra 1

Two students are absent. This is 1/8 of the entire class. How many students are in the entire class? Write the equation: How would you write an equation?

*asked by Bob on January 22, 2014* -
## Algebra

I have a few questions I need help with. They are to help review for our exam. 4) Without graphing, is each system independent, dependent, or inconsistent? -x-3y=0 x-y=4 (i believe dependent) dependent independent inconsistent 6) Which matrix represents

*asked by lila on January 2, 2013* -
## calculus

Consider line segments which are tangent to a point on the right half (x>0) of the curve y = x^2 + 1 and connect the tangent point to the x-axis. If the tangent point is close to the y-axis, the line segment is long. If the tangent point is far from the

*asked by Hal on November 14, 2009* -
## Math calculus 2

A propane tank is in the shape generated by revolving the region enclosed by the right half of the graph of (4*x^2)+(64*y^2)=144 and the y-axis about the y-axis. If x and y are measured in meters find the depth of the propane in the tank when it is filled

*asked by Anonymous on February 15, 2018* -
## Chemistry

'A solution is prepared by titrating a 100.0 mL sample of 0.10 M HF (Ka = 7.2 x 10^-4) with 0.1 M NaOH. What is the pH after 20.0 mL of the 0.10 M NaOH is added?' I'm a little bit confused but here's my ICE chart (in moles): HF________OH-_____F-

*asked by SarahF275 on February 21, 2018* -
## Math - Algebra 2

In a certain math class, each student has a text book, every 2 students share a book of tables, every 3 students share a problem book, and every 4 students share a mathematics dictionary. If the total number of books is 75.. how many students are in a

*asked by AS on December 2, 2006* -
## Math

Dominic earns $18 an hour plus $25 an hour for every hour of overtime. Overtime hours are any hours more than 35 hours for the week. Part A: Create an equation that shows the amount of money earned, E, for working x hours in a week when there is no

*asked by B&PT on May 16, 2017* -
## Chemistry

Good morning. I need help solving 2 problems for chemistry. For #1 I need someone to check my work and tell me if I did it wrong and show me how and where I went wrong. And for #2 I need someone to help me figure out how to solve it and explain. 1. With

*asked by Samantha on November 26, 2017* -
## trig

2. Determine the amplitude of: y= cos x 3. Determine the domain of: y= 4 sin x 4. Determine the range of: y= - sin x 5. Determine the period of: y= 3 sin ðx 6. Determine the phase shift of: y= 3 cos (2x -1) 7. Solve the following equation for indicated

*asked by Bernice on December 17, 2009* -
## Math

Assume that f is a continuous function from the real numbers to the real numbers such that for all numbers x,y, and a it is true that f(x+y)=f(x) + f(y) and that f(ax)=af(x). Further assume that f(1) = pi. Find f'(-1). Please explain your reasoning. I am

*asked by Leah on October 6, 2014* -
## math

Write an equation relating the number of questions I get right on a test to the total score I will get if the test has 20 questions each with the same point value and the test is worth 100 points total. I know each question is worth 5 points so I would

*asked by Ashley on September 17, 2014* -
## physics

"A 3.5 kg monket is suspended motionless 35 meter above the ground by holding two vines (a vertical vine and a diagonal vine)" We need to find the tension force in the diagonal vine as well as the angle of the diagonal vine with respect to the y axis. I'm

*asked by ana on October 11, 2015* -
## Chemistry

What volume of O2 is required to react with excess CS2 to produce 4.0L of CO2 Assume all gases at STP. Not sure what I am doing wrong, but the answer I am getting is not one of the answers. 4L/X mole=22.4 L/1 mole ===>.1786 mols Balanced equation: O2 + CS2

*asked by T on December 13, 2007* -
## Math

Which equation represents the solution to the following? I have some lemons. Jill has two more limes than five times the number of lemons that I have. Emma has one-third as many limes as Jill. Emma has 4 limes. How many lemons do I have?

*asked by Anonymous on June 26, 2015* -
## Math Modeling

How is the number of cars and other vehicles changing over time? You may need to model these using different types of vehicles. i'm suppose to develop an equation for the number of cars being produced over time. i found out the number of cars that was

*asked by Anonymous on April 3, 2010* -
## Physics

A)What is the equation for equivalent resistance for resistors wired in series? What about series wiring makes resistors in series add the way they do? B)What is the equation for capacitors wired in parallel? What about parallel wiring makes capacitors add

*asked by Luke on July 27, 2012* -
## Algebra

Consider the line =y+76x2 . Find the equation of the line that is parallel to this line and passes through the point , −7 4 . Find the equation of the line that is perpendicular to this line and passes through the point , −7 4 .

*asked by Krista on April 10, 2017* -
## Instantaneous rate of change

Please help.. Joe is investigating the rate of change of the function y=cos x on the interval xE[0,2π]. He notices that the graph of y=cos x passes through the x-axis at 45°. He also determines the instantaneous rate of change at x = 0, π, and 2π by

*asked by Kjd on May 23, 2012* -
## Chemistry

in an experiment, ammonia gas, NH3(g) was bubbled through distilled water. Some of the dissolved ammonia gas, NH3, reacted with the water to form the aqueous ammonia ions, NH4. When red litmus paper was placed in contact with the aqueous solution, the

*asked by Joe on March 4, 2013* -
## Algebra

f) Suppose you started with 100 bacteria, but they still grew by the same growth factor. Explain how your exponential equation in (b) would change. y=1*3x**** b) is Bacteria name: Staphylococcus aureus Generation Time: 30 minutes *Note: The generation time

*asked by BUBBLES on May 20, 2016* -
## science

The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the above equation if the object was 100,000 meters above the ground? (Note: this question refers to Newton’s equation for

*asked by ThuyD on January 22, 2012* -
## Chemistry------DrBobb..

Lead metal is added to 0.140 Cr^3+(aq). Pb(s)+ 2Cr^3(aq) Pb^2+(aq)+2Cr^2+(aq) KC=3.2*10^{-10} A. What is Pb^2+ when equilibrium is established in the reaction? B. What is Cr^2+ when equilibrium is established in the reaction? C. What is Cr^3+ when

*asked by Saira on February 7, 2009* -
## Equation of Time

Found a site containing a graph of the equation of time. If the graph was from yr 1998 will it still be OK to use today. Does the equation of time vary much from year to year? Thank you Mike I'm not quite sure about what you are asking. Since this is not

*asked by MIKE on October 19, 2006* -
## Algebra

I don't even know where to start, teacher gave us this with no direction. Suppose the polynomial R(x)=a9x^9+a8x^8+...+a,x+a0 has real coefficients with a9 cannot equal 0. Suppose also that R(x)has the following zeros: 5, 6, 5+5i. Using this information,

*asked by Rachal on February 4, 2011* -
## Math Help!!!

1. Which of these numbers can be classified as both real and rational? ½ -1.016879413894 Square root of 5 0.89089908999 2. Which is both a real number and an integer? Square root of 7 0.15 -15 1/3 3. Which is an example of an irrational number? Square

*asked by math help asap on November 12, 2014* -
## physics

A bead on a fixed ring and a spring A ring fixed to a support at the top is hanging vertically. A bead of mass m slides through the ring and is connected to the support through a spring of stiffness k as shown in the figure-1. The length of the unstretched

*asked by arslan on December 29, 2011* -
## math

1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the

*asked by Morgan S on December 19, 2012* -
## Plant Physiology

Hey i have a mid term today at 3 , and this one sample question my prof posted online. If someone can please show me how to get the answers i would really appreciate it: A plant cell is found to have a Ψs = - 0.7 MPa and a Ψp = 0.5 MPa. Is this cell

*asked by Saira on February 13, 2009* -
## algebra

1. - 5(2x+2)is greater than or equal to -10x - 17 (1 point) a)x is greater than or equal to 7 b)x is less than or equal to 19 c)all real numbers d)no solution

*asked by Emily on October 27, 2011* -
## Chemistry

If you can show me an example of one problem, I have no idea how to approach this. Calculate where the number 40.67 came from. Use the Clapeyron-Clausisus equation. Assuming that delta H vap does not change with temperature, this equation relates the

*asked by Angel on February 26, 2012* -
## macroeconomics

should we care more about nominal GDP or real GDP?? Thank you for using the Jiskha Homework Help Forum. Here is a link that discusses that very question: http://economics.about.com/cs/macrohelp/a/nominal_vs_real.htm A GDP based on the prices that prevailed

*asked by jenna on March 13, 2007* -
## The Nature of Chemical Reactions

1. Molarity is to moles of solute over liters of solution as molality is to A. molar concentration over molal concentration. B. moles of solute over kilograms of solvent. C. molal concentration over molar concentration. D. moles of solute over moles of

*asked by Anonymous on October 23, 2011* -
## Algebra

A zero of a polynomial is: A. A real number that makes f(x) = 0 B. A real number that makes x = 0 C.A real or complex number that makes f(x) = 0 D. A real or complex number that makes x = 0 Is the answer A?

*asked by Jason on February 18, 2015* -
## math check my answer ?

What is the range of f(x)=−3x−1? the set of real numbers less than 0 the set of real numbers greater than 0 the set of real numbers greater than −1 the set of real numbers less than −1

*asked by Vicky on January 5, 2017* -
## Math

find f(-3) for f(x)= 3x-x^2 f(-3)=0 f(-3)=18 f(-3)=-18

*asked by Dee on November 7, 2016* -
## Algebra 2

1)Write an equation for the parabola with focus (4,0) and directrix y=2 4c(y - k) = (x - h)^2 4(-1)(y - 1) = (x - 4)^2 -4y + 4 = (x - 4)^2 -4y = (x - 4)^2 - 4 y = (-1/4)(x - 4)^2 + 1 2)Write an equation for the ellipse with end points of the major axis at

*asked by Jon on May 20, 2008* -
## Math

1. What is the equation in standard form of a perpendicular line that passes through (5,1)? 2. What is the x-intercept of the perpendicular line? 3. What is the equation in standard form of a parallel line that passes through (0,-2)? 4. On the parallel

*asked by Elizabeth on January 23, 2014* -
## AP CHEM

It was found that 39.9 mL of this diluted solution solution was needed to reach the stoichiometric point in a titration of 7 mL of a phosphoric acid solution according to the reaction 3KOH(aq) + H3PO4(aq) ! K3PO4(aq) + 3H2O(L) Calculate the molarity of the

*asked by Ankit on September 26, 2013* -
## Algebra

A total of $7000 is invested in three accounts. Some was invested at 6%, some at 8%, and the rest at 9%. find the amount invested at each rate if the total interest for one year was $555 and the amount invested at 8% was three times the amount invested at

*asked by Diego on December 4, 2014* -
## Physics

A solenoid with 200 turns and a cross sectional area of 60 cm^2 has a magnetic field of .60 T along its axis. If the field is confined within the solenoid and changes at a rate of .20 T/s, the magnitude of the induced potential difference in the solenoid

*asked by Jasmine on November 13, 2011* -
## college algebra

use the rational zeros theorem to find all the real zeros of the polynomial function,. use the zeros to factor f over the real numbers. f(x)=11x^3-x^2+11x-1 please show all work

*asked by ladybug on November 19, 2012* -
## fractions

If a scaled building is 672ft in real life, and you need to scale it to 1/320th size, how tall would it be if 1ft real size = 1inch scaled size? Please show how this done

*asked by Anonymous on June 1, 2012* -
## geology / science

the age of granite can be determind using radiometric dating, explain the basis for the determination of a 238 U- Pb radiometric date of 1120 Ma for a granite. I have as the answer 238 U decays to Pb with an experimental law, that is the amount of U and Pb

*asked by bex on April 18, 2007* -
## Physics

A 5.00-kg box is suspended from the ceiling by a cord that is 50.0 cm long. A 10.0-g bullet was fired horizontally with speed at 350 m/s into the box. By how much will the vertical height of the pendulum change? Clue: To get the speed of bullet and box

*asked by Candu on October 5, 2017* -
## Mathematics

A space camera circles the Earth at a height of h miles above the surface. Suppose that d distance, IN MILES, on the surface of the Earth can be seen from the camera. (a) Find an equation that relates the central angle theta to the height h. (b) Find an

*asked by Javier on February 22, 2008* -
## Calculus

Could someone help me setup an equation for this equation? --------------------------------- A city bus system carries 4000 passengers a day throughout a large city. The cost to ride the bus is $1.50/person. The owner realizes that 100 fewer people would

*asked by Jake on March 7, 2012* -
## statistics

One method for estimating the availability of office space in large cities is to conduct a random sample of offices, and calculate the proportion of offices currently being used. Suppose that real estate agents believe that of all offices are currently

*asked by tea on March 26, 2012* -
## math

Please check answers 1. Maria has a 25-page manuscript. The equation below shows the relationship between the total cost of editing 25 pages, T, and the cost per page, c, if she gets the 5% discount. 25c - 0.05(25c) = T Using the equation, what is the best

*asked by Please Need Help Quickly on October 13, 2015* -
## Algebra

Greta invests $10,000 in an investment that pays 3% interest, compounded annually, for the first three years, then 9% interest, compounded annually, for the last three years. Rui invests $10,000 in an investment that pays r% for all six years. The two

*asked by Cassie on April 2, 2009* -
## math

Please explain in detail how to solve each question: At a certain high school, 350 students are taking an algebra course. The ratio of boys to girls taking algebra is 33:37. How many more girls are taking algebra than boys? How can you write a system of

*asked by Jane on January 4, 2012* -
## math

1)The area A of a triangle varies jointly as the lengths of its base b and height h. If A is 75 when b=15 and h=10,find A when b=8 and h=6 2)Determine the equation of any vertical asymtotes of the graph of f(x)=2x+3/x^2+2x-3 1) Area of a triangle is 1/2

*asked by Marissa on August 21, 2007* -
## CALCULUS

Using separation of variables technique, solve the following differential equation with initial condition dy/dx = (yx + 5x) / (x^2 + 1) and y(3) = 5. The solution is: a.) y^2 = ln(x^2 + 1) + 25 - ln10 b.) ln(abs(y+5)) = ln(x^2 + 1) c.) ln(abs(y+5)) =

*asked by Anonymous on May 26, 2012* -
## Chemistry URGENT

Could someone let me know if I have balanced these equations correctly. balanced equation of the reaction of iron and oxygen to produce iron(ii)oxide. 2Fe + O2 = 2FeO Also if the balanced equation of the reaction of iron and oxygen to produce

*asked by linda on March 27, 2014* -
## another A.P Chemistry Question

A different rigid 5.00L cylinder contains 0.176mol of NO(g) at 298 k. A 0.176mol sample of 02(g) is added to the cylinder, where a reaction occurs to produce NO2(g) (d) write the balanced equation for the reaction. (e) calculate the total pressure, in atm,

*asked by T-Baby on October 23, 2006* -
## Algebra

Prada Sport 02LS Gloss Black 02LS 1AB1A1 £132.30 My equation is as follow: S=C(1+r/100)^5. This is to determine the inflated cost S, in five years, of an item, good and service, where C is the current price of that item in that country currency and where

*asked by Mayl on June 23, 2010* -
## history

who where the moors? And if you are a real teacher, dont give me wikipedia because a real teacher knows wikipedia is not a reliable source.

*asked by andrew on May 14, 2019* -
## math

An artisan can sell 120 garden ornaments per week at $4 per ornament. For each $0.50 decrease in price, he can sell 20 more ornaments. a) determine algebraic expressions for the price of a garden ornament and the number of ornaments sold. b) write an

*asked by Gianluca on November 20, 2010* -
## algebra

In your post, include the height, the width, and the calculations needed to determine the length of the diagonal of your computer monitor. After you have calculated the approximate length using the Pythagorean theorem, use a measuring device to measure the

*asked by Patrick on November 22, 2007* -
## Math...PLEASE

I need help to see if I did these steps and problems right before I hand this in…I am stuck, and cannot figure out question three part b and H…I just need help with the proper function of b and h part. 1. An anthropologist drives a car at a speed of 30

*asked by Holly on December 3, 2009* -
## Algebra

I need help to see if I did these steps and problems right before I hand this in…I am stuck, and cannot figure out question three part b and H…I just need help with the proper function of b and h part. 1. An anthropologist drives a car at a speed of 30

*asked by Holly on December 4, 2009* -
## C programming, not C++

design and implement such a function and use it in a program called part3.c that allows someone to enter two real numbers and an epsilon value (also a real number) and reports if the two numbers are equal (+/- epsilon) or not. If you were asked this

*asked by apoorva on April 16, 2008* -
## how to understand this

design and implement such a function and use it in a program called part3.c that allows someone to enter two real numbers and an epsilon value (also a real number) and reports if the two numbers are equal (+/- epsilon) or not. If you were asked this

*asked by apoorva on April 16, 2008* -
## Chemistry

How is the law of conservation used to balance a chemical equation? In a chemical equation, the products formed have the same atoms as the original reactants; however, the atoms may be rearranged with different subscripts. The law of conservation of mass

*asked by Quinn on November 30, 2018* -
## calculus

hi! just needed help on an FRQ for ap calculus ab. let me know if you have any questions for me. I'm just really confused as far as what I am meant to do. If you could walk me through it that would be amazing. THANKS!! A population is modeled by a function

*asked by phoebe on February 16, 2015* -
## Math

4.Longview is located between Tyler and Marshall on the state highway. THe distance between Tyler and Longview is 45 miles. THe distance between Longview and Marshall is 25 miles. Which equation could be used to find d, the round trip between Tyler and

*asked by Jerald on April 3, 2013* -
## AP Chemistry

1. Equilibrium 2SO3(g) O2(g) + 2SO2(g) A 3.21g sample of sulfur trioxide is placed in a 2.25 L cylinder and allowed to reach equilibrium at a constant temperature of 500 , as shown in the above equation. Analysis shows 1.23 X 10^-2 mol of sulfur dioxide at

*asked by anonymous on April 10, 2007* -
## Calc 3

A cooling tower for a nuclear reactor is to be constructed in the shape of a hyperboloid of one sheet. The diameter at the base is 300 m and the minimum diameter, 500 m above the base, is 200 m. Find an equation describing the shape of the tower in the

*asked by Becky on September 12, 2012* -
## pre-algebra

You are working on a polynomials problem with algebra tiles. You have five big squares, seven rectangles, and eight small squares on your desk. your classmate leans over and borrows three big squares, one rectangle, and five small squares. Write an

*asked by Dj on March 17, 2008* -
## Chemistry

Diethyl ether (also known as “ether”), C4H10O (l), is an organic compound that has long been used as a surgical anesthetic. The complete combustion of 1 mol of C4H10O (l) to CO2 (g) and H2O (l) yields ΔH °=-2723.7 kJ. a) Write a balanced equation for

*asked by Feufolia on March 10, 2016* -
## Hydrodynamics, Fluid Mechanics

Assume δxi, δzi

*asked by Johan on March 5, 2019* -
## psychology

how can we know that the world around us is real and what do we mean by real?

*asked by abigael gamboa on September 20, 2011* -
## Statification in Sociology

White Trash author Isenberg has a very pessimistic view of American ideal( real vs ideal culture) Do you think she's right that these are more ideal than real from a historical perspective? Poverty, who is poor, what the working people look like, racial

*asked by Penny on February 7, 2017* -
## Chemistry Check

The Synthesis of hydrogen chloride is written H2+Cl2==>2HCl. 3L of hydrogen are used and all gasses are at STP. The volume of HCL produced in the reaction would be _______ L. would the answer be 5.96? Three liters of H2 yields six liters of HCl, from the

*asked by Briana on January 19, 2007* -
## physics

TRUE OR FALSE The virtual image formed by a convex mirror is always enlarged. A convex mirror never forms a real image of a real object. When the object of a concave mirror is inside the focal point, the image is virtual. The image produced by a convex

*asked by help? on May 24, 2008* -
## Algebra

Need help with two questions. I've been stuck on them for a while now. 1) Find a general form of an equation of the line through the point A that satisfies the given condition. A(−2, 5) slope 3/4 2)Find a general form of an equation of the line through

*asked by Jim on February 25, 2013* -
## calculus

A research chemist has two different salt water solutions. Solution 1 is 25% salt and solution 2 is 20% salt. She wants to have 1 liter of 22% solution. How much of each solution should she mix together to get the desired solution?

*asked by Anonymous on January 25, 2018* -
## Algebra

Can you please help me with this problem: The x-intercept of a line has a value of -3/2 and a y intercept of 3. Another line has a slope that is three times the slope of the first line and has a y-intercept that is 28 more than the first line's

*asked by Lucille on December 11, 2016* -
## science

For a machine with an efficiency of 80%, what is the work output of the machine if its work input is 2,000 joules? would i divide 2000/.80? which gives me 2500? Also, If a machine requires an effort force of 750 newtons applied over a distance of 2 meters,

*asked by please help(: on November 4, 2009* -
## Physics

I solved the following question: "A ball is launched from the top of a 320 m high building at 50 m/s at an angle of 37 degrees to the horizontal. For the first 10 seconds of flight, make a table of the vertical position from the ground versus time similar

*asked by Joe on November 1, 2010* -
## Physics

The equation describing the (r, \theta ) coordinates of points along a single field line of a magnetic dipole is r=R_0 \sin ^2(\theta ) where \theta =0 is in the direction of the dipole moment and R_0 is a constant which is different for each field line.

*asked by Phy on April 6, 2013* -
## chemistry

Oxalic acid (H2C2O4) can be used to remove rust according to the following balanced equation: Fe2O3 + 6H2C2O4 --> 2Fe(C2O4)33- +3H2O + 6H+ Calculate the number of grams of rust that can be removed by 5.00 x 102 ml of a 0.122M solution of oxalic acid. I

*asked by amber on October 4, 2010* -
## Chemistry

A 1.50-g mixture of the solid salts Na2SO4(molar mass 142.04 g/mol) and Pb(NO3)2(molar mass 331.20 g/mol) forms an aqueous solution with the precipitation of PbSO4 molar mass 303.26 g mol The precipitate was filtered and dried, and its mass was determined

*asked by Anwa on March 20, 2017* -
## math

60 ml of solution A is mixed with 120 ml of solution B to produce solution C which contains 8% of pure acid. If 80ml of solution A is mixed with 40ml of solution B, a solution D containing 10% of pure acid can be produced. find the percentage of pure acid

*asked by anjan on July 5, 2011* -
## chemistry - Dr.Bob222 please help

Hi Everyone, Anyone want to try giving these a shot? The right electrode in a cell is a piece of copper immersed in a 1.00 L solution of 0.0701 F copper sulfate. The left electrode is a galvanized nail (i.e., an iron nail that is completely coated with a

*asked by ajones51 on November 7, 2006* -
## Big review 4 finals (2 posts in 1) check my work

A 7.58 gram sample of benzoic acid, C6H5CO2H, is dissolved in 100 mL of benzene. The density of benzene is 0.879 g/mL. What is the molality of the benzoic acid? Sol: Convert mL to grams benzene. 100 mL * (0.879g benzene/1 mL) = 87.9 g Molality = #

*asked by Kizner (chem) on June 14, 2006* -
## Physics

One object is thrown straight up at 54.9 m/s from the ground at the base of a building with is 157.9 meters tall. At the same time the object is thrown up at the bottom of the building, another object is thrown straight down at the top of the building. If

*asked by Kimmy on September 24, 2014* -
## poiseuille's law

GIVEN: L = 3.0 cm = 0.03 m r = 0.3 mm = 0.0003 m (delta) y = 1.0 m 1 pint = 500 cm^3 [approx.] given a) Find the rate of flow, F = ? b) How long will it taken to inject 1 point of blood, t = ? a & b) I know we need to find the pressure or speed. F = (P at)

*asked by Sarah on November 26, 2013* -
## Chemistry

A 35.00 mL sample of water at 30.0°C is placed in an open container with an external pressure of 1.00 atm. 30.0 kJ of heat is added to the water sample. The density of water is 1 g/mL. (a) How many grams of liquid water remain at the end of the process?

*asked by N on February 11, 2015* -
## Math

people located less than 10 km from the hospital are judged to have excellent access to the hospital, those located exactly 10 km away have acceptable access, any anyone living further than 10 km away has poor access. a) If the hospital is located at

*asked by 786 on March 8, 2016* -
## maths

please help im quite stuck with this question a boat sails in a straight line, its position at time t is (-t+600,2t-300). a man stands on a small island, at position (200,100). due to fog, he can see objects of radius 200m centred at his position. a) find

*asked by braidy on May 21, 2007* -
## math

1. In this problem, we analyze the profit found for sales of decorative tiles. A demand equation (sometimes called a demand curve) shows how much money people would pay for a product depending on how much of that product is available on the open market.

*asked by Jesse on June 25, 2010* -
## Chemistry

Each of the following mixtures is placed in a dialyzing bag and immersed in distilled water. Circle the substances that will be found outside the bag in the distilled water. a. KCl solution and glucose solution b. albumin solution (colloid) c. albumin

*asked by porsha on June 13, 2017* -
## college algebra--please help

what does Descartes rule of signs tell you about the possible number of positive real number zeros and the possible number of negative real zeros of the function? 1. f(x)=2x^5-5x^2+x-1 2. f(x)=5x^6+7x^4-x-6 please show work

*asked by ladybug on November 19, 2012* -
## math

let line A be the graph of the equation x+7y = 3 and let line B be given by the equation 2x + 15y = 6. Use an augmented matrix to determine if the two lines meet and if so at which point. Graph the two lines and indicate their meeting point if it exists.

*asked by Lisa on July 1, 2017*

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