# sara

Newest questions and responses by sara-
## Math

The polynomial expression: (1/16x^2 + 1/3x + 4/9) can be written in the form (Ax+b)^2. The value of the product, AB, to the nearest one hundreth, is____?

*asked on January 18, 2019* -
## math

x-21/(x^2-9) - x/(3-x) so I did x-21/((x-3)(x+3)) - x/-(x-3) x-21+x(x+3)/((x-3)(x+3)) x-21+x^2+3x/((x-3)(x+3)) 4x-21+x^2/((x-3)(x+3)) x^2+4x-21/((x-3)(x+3)) x(x+7)-3(x+7)/((x-3)(x+3)) (x+7)(x-3)/((x-3)(x+3)) the x-3 cancel out so the answer is x+7/x+3 is

*asked on January 5, 2019* -
## Math

1/x^2+3x+2 + 2/x^2-1 I first did 1/x^2+2x+x+2 +2/(x-1)(x+1) 1/x(x+2)x+2 +2/(x-1)(x+1) 1/x+2(x+1) +2/(x-1)(x+1) x-1+2(x+2)/(x+2)(x-1)(x+1) x-1+2x+4/(x+2)(x-1)(x+1) 3x+3/(x+2)(x-1)(x+1) 3(x+1)/(x+2)(x-1)(x+1) the x+1 cancel out so 3/(x+2)(x-1) 3/x^2-x+2x-2

*asked on January 5, 2019* -
## Math

The problem is… 8X^4/25-9x^2• 3X^2- 8X+5/x^2-1~4x^3/x^2+2x+1 NOTE: I used~ to equal a division symbol So I did 2x/-(3x-5)(5+3x)•3x(x-1)-5(x-1)/(x-1)(x+1)•(x+1)^2 2x/-(3x-5)(5+3x)•(x-1)(3x-5)/(x-1)(x+1)•(x+1)^2 2x/5+3x•-1(x+1) -2x^2+2x/5+3x Is

*asked on January 5, 2019* -
## History

Can you help me find a war that is currently going on in the world and 5 reasons why?

*asked on December 20, 2018* -
## math

Project - would you please check my answers? I am working on a project and my linear equation came out to be: y = 1502.9x - 2847386 This project is about waste and recycling so the equation came from a table that gave a few years and the tons of waste in

*asked on December 5, 2018* -
## Physics

A pitcher throws a fastball during a ballgame. The velocity of the ball is 44 m/s. The mass of the ball is 150 grams. The catcher catches the ball in his glove at 0.2 seconds. a) Compute the impulse the glove exerts catching the ball. I'm lost on part a.

*asked on November 12, 2018* -
## math

find the vertex,focus and equation of the direction of y=-1/16(x-6)^2+3 Y=1/2p(x-h)^2+k p=8 h=6 k=3 so I now got (6,3) when doing it over again. I now got so vertex is (6,3), focus is (6,7) and directrix = y=-1 Is these corrections now right? Thank you for

*asked on October 22, 2018* -
## math

find the vertex,focus and equation of the direction of y=-1/16(x-6)^2+3 Y=1/2p(x-h)^2+k p=8 h=6 k=3 (6,3) so vertex is (6,3), focus is (6,-1) and directrix = y=7 Is this correct?

*asked on October 22, 2018* -
## math

a baseball is hit straight up from a height of 6 feet with an initial velocity of90 feet per second. given the equations=-16t^2 +v0t + s0, that models the height of the ball,s, as a function of time ,t where the initial height of the ball is s0 and the

*asked on October 21, 2018* -
## math

Which of the following could identify the transformation of a parabola with a vertex of (-4,-6) to a parabola with a vertex of (1,-6) 1) f(x)+5 2) 5f(x) 3) f(x+5) 4) f(x-5) I added the two x values. so you will need to add 5 to transform it. my choice is

*asked on October 21, 2018* -
## math

The initial cost for attendance to carnival A is $12and each ride costs $2. The initial cost for attendance to carnival B is $16 and each ride cost $1.50. a) in function notation write A(x) to represent the total cost of attending carnival A and going on x

*asked on October 21, 2018* -
## math

This question has a few parts to it. I tried but not sure if they are correct. A boy standing on top of a building in Albany throws a water balloon up vertically. The height (h) in feet, of the water is given by the equation h(t)=-16t^2+64t +192. where the

*asked on October 21, 2018* -
## math

The factors of X^4-13x^2+36 when factored completely are I did x^2(x^2-4)(x^2-9) (X+3)(x-3)(x+2)(x-2) it was multiple choice 1. (x^2+9)(x^2+4) 2. (x^2+9) (x+2)(x-2) 3. (X+3)(x-3)(x+2)(x-2) 4. (x+3)(x+3)(x+2)(x+2) my answer is choice 3. Thanks for checking

*asked on October 21, 2018* -
## math

In order to successfully perform a trick, a flying trapeze artist must swing along a parabolic path that is equidistant from the floor and the pivot point where the trapeze rope is attached. The rope is attached at the ceiling 8 feet above her starting

*asked on October 21, 2018* -
## math

The expression X^2(x+3)-9(x+3) is equivalent to (x+3)^n(x-3) when n equals? I got an answer of 2 I did X^2(x+3)-9(x+3) (x+3)^n(x-3) 4(5)-9(5)=-25 -25=(5)^n(-1) n=2 Is this correct? Thank you for checking my work

*asked on October 21, 2018* -
## Chemistry

Restart the PhET simulation and set it up in the following manner: select Oscillate, select No End, and use the parameters in parentheses by sliding the bars for Amplitude (1.00 cm), Frequency (1.20 Hz ), Damping (none), and tension (highest). Using the

*asked on October 18, 2018* -
## math

If Y=(X) has a range of [3,18], what is the range of Y =1/3f(x-2)-4? I took the first 3-4=-1 Then the 18-4=14 R[-1,14] But I got it wrong so can you please explain the steps

*asked on October 11, 2018* -
## Math- algebra 2

If Y=(X) has a range of [3,18], what is the range of Y =1/3f(x-2)-4? I took the first 3-4=-1 Then the 18-4=14 R[-1,14] But I got it wrong so can you please explain the steps

*asked on October 11, 2018* -
## linear algebra

Let T be the plane 2x−3y = −2. Find the shortest distance d from the point P0=(−1, −2, 1) to T, and the point Q in T that is closest to P0. Use the square root symbol '√' where needed to give an exact value for your answer. I need help with this

*asked on October 2, 2018* -
## linear algebra

Let T be the plane −x+2y = 4. Find the shortest distance d from the point P0=(2, 2, 1) to T, and the point Q in T that is closest to P0. Use the square root symbol '√' where needed to give an exact value for your answer. I know I have posted this many

*asked on October 1, 2018* -
## linear algebra

Let L be the line passing through the point P=(−3, −1, −5) with direction vector →d=[4, 0, 4]T, and let T be the plane defined by 4x−y−3z = 16. Find the point Q where L and T intersect. please help..

*asked on October 1, 2018* -
## Linear Algebra

Let T be the plane −y+2z = −8. Find the shortest distance d from the point P0=(−5, 4, 2) to T, and the point Q in T that is closest to P0. Use the square root symbol '√' where needed to give an exact value for your answer. d = 0 Q = (0, 0, 0)

*asked on September 30, 2018* -
## Math

A rectangular plot of land that has an area of 1200 sq. ft, will hold a rectangular garden whose length is 8' more than twice the width, and will be bordered by a 3' wide sidewalk for pedestrians. Write a function that describes the area of the garden with

*asked on September 23, 2018* -
## social studies

What is the Babylonian King Hammurabi most remembered for today? A. his code of law B. his great wealth C. his military conquests D. his public works projects

*asked on September 21, 2018* -
## English

Hello, is this sentence grammatically correct? The lecturer explained to us how greenhouse gases come about, and we soon wondered what we could do to forestall disaster.

*asked on September 10, 2018* -
## chemistry

what is the number of molecules of c2h6o required to have 135 atoms in total?

*asked on September 8, 2018* -
## english-sentence

is this sentence correct? I have a loving two year old son, whom can sometimes be a handful.

*asked on August 30, 2018* -
## math

Two cars are side by side. One is 3.9 meters long. The other is 6% shorter. How long is the second car? I know the answer is 3.7, but how?

*asked on June 26, 2018* -
## Organic Chem

what is the pka of anhydride? i've searched the whole web and can't seem to find the pka of the functional group.

*asked on May 8, 2018* -
## Chemistry

Calculate molarity 9.8g r 500 ml

*asked on April 8, 2018* -
## Calculus

Consider the functions A(x, y) = x^2y + xy − 3xy^2, and B(x, y) = xe^xy − y. (a) Calculate the x derivative of A, or Ax. (b) Calculate the y derivative of A, or Ay. (c) Calculate the x derivative of B, or Bx. (d) Calculate the y derivative of B, or By.

*asked on April 3, 2018* -
## math

Christina finances a piano for $3,070 by taking out an installment loan for 24 months. The payments were $153.50 per month and the total finance charge was $614. After 14 months, Christina decided to pay off the loan. After calculating the finance charge

*asked on March 13, 2018* -
## math

Scott purchases a piano costing $2,630 by taking out a 13% add-on interest installment loan. The loan requires a 15% down payment and equal monthly payments for 5 years. How much are Scott's monthly payments?

*asked on March 13, 2018* -
## math

You purchase a hot tub costing $4,600 by taking out a 13% add-on interest installment loan. The loan requires a 15% down payment and equal monthly payments for 4 years. How much are your monthly payments?

*asked on March 13, 2018* -
## Math

Given that g is the inverse function of f, and f (3) = 4 , and f ′(3) =5 , then g′(4) = -1/5 -3/5 3/5

*asked on February 25, 2018* -
## physics

Determine the x and y components of the following three vectors in the xy plane. 1) A 19-m/s velocity vector that makes an angle of 40° counterclockwise from the -x direction. x: 2) y: Explain please!

*asked on February 17, 2018* -
## Chemistry

hydrobromic acid (50.5) calculate the concentration in mol/L. (MW HBr: 80.91 g/mol, density: 1.49 g/mL)

*asked on February 16, 2018* -
## Computer science C++

3. After following statements have executed, find the value of the variable a. int a=5; while (a

*asked on February 13, 2018* -
## Math

Jason was hired to mow a lawn that covers an area of 2 3/4 acres it took him 4 1/8 hours to complete the job what was his unit rate and hours per acre you multiply the numerator and a complex fraction by the reciprocal of the denominator to calculate our

*asked on February 7, 2018* -
## math

An object is dropped from a balloon 3600 feet above the ground. Find the time it takes to reach the ground if the height of the object is given by the equation h(t) = –16t^2 + 3600

*asked on February 5, 2018* -
## Math

The length of a rectangle is three times as long as its width. Its area is 675 square feet. a. Write an equation that demonstrates the given information. b. Find the dimensions of the rectangle.

*asked on February 5, 2018* -
## history

Which of the following best applies to religion in the High Middle Ages? 1. Pilgrimages to holy shrines declined as the practice of indulgences increased 2. The Bible was translated and widely read in the vernacular (every day, spoken) languages 3. The

*asked on January 23, 2018* -
## math

Determine whether ∆QRS is a right triangle for the given vertices. Explain. Q(18, 13), R(17, –3), S(–18, 12)

*asked on January 19, 2018* -
## History

1. In the Lindisfarne Gospels, what symbol represents St. Mark? (The Winged lion?) 2. In the Lindisfarne Gospels, who is the only evangelist who is pictured facing the reader directly? (I think its John) 3.In the Book of Kells, how many evangelists are

*asked on January 15, 2018* -
## math

Determine whether ΔGHI is a right triangle. G(-2, 1), H(3, -1), I(-4, -4). Can you please show the steps too? Thank you!

*asked on January 14, 2018* -
## history

Which European country was controlled by Muslims throughout the Middle Ages, and what year did Christian rulers finally take power away from the Muslims?

*asked on December 18, 2017* -
## math

The vertices of a triangle are L(1,3), M(4,0), N(-4,1) LO is a median of the triangle. What are the coordinates of point O? Explain.

*asked on December 16, 2017* -
## math

The value of Sara's new car decreases at a rate of 8% each year. 1.Write an exponential function to model the decrease in the car's value each month. 2.Write an exponential function to model the decrease in the car's value each week. 3.Write an exponential

*asked on November 17, 2017* -
## English

How to re-word this please? The Emmett Till Unsolved Civil Rights Crimes Reauthorization Act of 2016 will be considered by the House on Wednesday, December 7. under the rules. S. 2854 was proposed on April 26, 2016, by Senator. Richard Burr Republican of

*asked on November 8, 2017* -
## English

How can I re-word this to start my summary ? On Wednesday, December 7, 2016, the House will consider S. 2854, the Emmett Till Unsolved Civil Rights Crimes Reauthorization Act of 2016, under suspension of the rules. S. 2854 was introduced on April 26, 2016,

*asked on November 8, 2017* -
## Math

Give the domain and range of the following functions: f(x) = 1⁄4x – 7 g(x) = 3x2+ 2

*asked on October 21, 2017* -
## math

-2/5x-9

*asked on October 18, 2017* -
## Exponential and Logarithmic functions

A certain material decays at a rate of 1.9% per year. The sample is 260 grams. How much will be left in 11 years? How long will it take to have only a 100g sample left?

*asked on October 12, 2017* -
## Opreating System

Hi, i need help with this opreating system homework. Part 1: you need your C program to do the following in order to achieve this desired output. (1) navigate the subfolders of the proc folder looking for those folders holding information about processes

*asked on October 11, 2017* -
## Opreating System

Hi, i need help with this opreating system homework. Part 1: you need your C program to do the following in order to achieve this desired output. (1) navigate the subfolders of the proc folder looking for those folders holding information about processes

*asked on October 10, 2017* -
## Math

For the following geometric sequence find the recursive formula and the 5th term in the sequence. In your final answer, include all of your work. {-4, 12, -36, ...}

*asked on September 29, 2017* -
## Biology

What is a protein that transports ions across the plasma membrane without requiring energy or changing shape?

*asked on September 13, 2017* -
## psychology

does someone know a good website that includes b.f. skinner in behavioral approach ,or just inform about him?

*asked on September 4, 2017* -
## MATH

A prism has a cross section that is a right angled triangle.its volume is 60 cm^3.What could the dimensions of prism be?

*asked on July 13, 2017* -
## maths

Aprism has a cross section that is a right angled triangle.Its volume is 6 cm^3.What could the dimentions of this prism be ? .....cmby..........cmby.....cm(2)

*asked on July 13, 2017* -
## Physics

an object of mass m is being weighed in an elevator that is moving upward with an acceleration a. What is the eesult if the weighing is done using a spring balance and a pan balance?

*asked on June 28, 2017* -
## Math

How would I go about solving y - 6 is greater than or equal to = 12?

*asked on June 1, 2017* -
## Math

y + 5 is equal to or greater than 7 Is y less than or greater than 12? Please check, and help correct.

*asked on May 26, 2017* -
## Math

x/4 + 1 = -6 I'm not sure the process to solve the equation, could I have help?

*asked on May 26, 2017* -
## physics

If 335 g of water at 65.5 °C loses 9750 J of heat, what is the final temperature of the water? Liquid water has a specific heat of 4.18 J/(g.°C). °C (Answer a number only, no units. Round to the tenth place). This is an example of an endothermic or

*asked on May 22, 2017* -
## algerbra

can someone check my work for this question? the question is to graph the function of square root of x plus 2 with the plus 2 not being in the square root my x values were 0,1, 4, 9, and 16 my y values were 2, 3, 4, 5, and 6 the next part says to write the

*asked on May 22, 2017* -
## algerbra

can someone check my work for this question? the question is to graph the function of square root of x plus 2 with the plus 2 not being in the square root my x values were 0,1, 4, 9, and 16 my y values were 2, 3, 4, 5, and 6 the next part says to write the

*asked on May 22, 2017* -
## math

The question is: the table below lists the total cost for parking for a period of time on the street in NYC. The total cost for any time up to and including the hours parked. For example, parking up to and including 1 hour would cost $1.25; for 3.5 hours

*asked on May 21, 2017* -
## Algebra

I have a few of these questions that I need help on, please help me! 1. 16x^2 + 2 + 2x - 15x^2 - 1 + 14x 2. 2x^2 + 8 8 - 4x + 3x - 6x^2 + 7 3. 2x^2 = 6x - 7x +8 - 3x^2 + 1 5. (m^2 - m - 4) + (m - 5) 6. (5x^2 + x - 3) - (-2x^3 + 4) 9. 64^10/64^5 10.

*asked on May 21, 2017* -
## math

On the set of axes below, graph the function represented by y=cubed root of x-2 for the domain -6< or equal to x< or equal to 10. x column I did -6, 1, 2 , 3 ,10 y column I did -2, -1, 0, 1, 2 Then I plotted these points. Is this correct? Thanks for

*asked on May 20, 2017* -
## Math

An employee earns $200 for 14 hours work. Assuming he is paid by the hour, how much will this employee earn in 35 hours?

*asked on May 14, 2017* -
## math

my watch is twelve minutes slow .the bus for which I am waiting should have arrived at 3.49pm but it is five minutes late. What time would my watch show when the bus arrives?

*asked on May 7, 2017* -
## geometry

Find the lateral area of a regular square pyramid whose slant height is 20 and whose base has an edge length of 7

*asked on May 5, 2017* -
## statistics

Recent studies, as summarized, for example, in E. Mortensen et al. (2002). The association between duration of breastfeeding and adult intelligence. Journal of the American Medical !@#$%^& o ciation , 287 , 2365–2371, suggest that breast-feeding of

*asked on April 27, 2017* -
## Math

If

*asked on April 23, 2017* -
## Math

If

*asked on April 23, 2017* -
## statistics

The professor teaching a large introductory class gives a final exam that has alternate forms, A, B, and C. A student taking the exam using Form B is upset because she claims that Form B is much harder than Forms A and C. Discuss how percentile point data

*asked on April 23, 2017* -
## math

This is a multiple choice question. What is the solution of the equation 2(x+2)^2-4=28 1)2 only 2)6 only 3)-2 and 6 4)2 and -6 I did (2x+4)(2x+4)-4=28 4x^2+8x+8x+16-4=28 4x^2+16x+12=28 4x^2+16x=16 This is where I get stuck, can you help? thank you

*asked on April 23, 2017* -
## math

The equation d=0.12v^2 + 2.1v models the distance d in feet it takes a car traveling at a speed of v miles per hour to come to a complete stop. Graces car was able to stop after 350ft on a highway. If the speed limit in the area was 35 miles per hour, was

*asked on April 23, 2017* -
## Math

Michael can travel at 166.35mph in his Ferrari. How far can he travel in 5 hours?

*asked on April 22, 2017* -
## Math

Colin lived in Scotland and was going to take his caravan on holiday to France. On the first day he travelled 472.87 miles to Portsmouth. He got a ferry which travelled 73.92 miles. He then got off the ferry and drove 134.56 miles to the camp site. How far

*asked on April 22, 2017* -
## 9th grade English

Sam had to mix __________ parts of the two chemicals for the experiment. a. equaled b. equitably c. equal d. equate f. equation I pick C This seems to easy am I missing something?

*asked on April 21, 2017* -
## Story section

Imagine you are an old ragged doll.You have just been thrown away by your owner.Tell the story of what happens to you. Please at least write 4 or 5 sentences to make a start Thank you

*asked on April 14, 2017* -
## Logic

Which of the following is not like the others? A. 1 B. 22 C. -2 D. 50 E. -94

*asked on April 13, 2017* -
## Logic

Which of the following is not like the others? A. Mars B. Venus C. Asparagus D. Potatoes E. Computers F. Cheeses G. Chairs H. Pasta

*asked on April 13, 2017* -
## Maths

A boy spends 1/4 of his money on sweets and 1/3 on computer games. What fraction of his money does he not spend?

*asked on April 11, 2017* -
## Trigonometry

The first three terms of an arithmetic progression are 1/2, x, 25. The first three terms of a geometric progression are x+1/4, 32 1/2, and y, where x and y are positive numbers. Find the value of X and the value of Y.

*asked on April 7, 2017* -
## MATH

Jenny is running an experiment for organic chemistry class. She needs exactly 100 ml of 70% hydrochloric acid, but the lab only has 90% and 40% solutions. How much of each solutions does she need to mix in order to obtain 100 ml of 70% hydrochloric acid

*asked on April 5, 2017* -
## Math

What is 7 to the nearest hundred?

*asked on April 5, 2017* -
## MATH!!

There are two numbers whose sum is 50. Three times the first is 5 more than twice the second. What are the numbers?

*asked on April 5, 2017* -
## math

15(5^x-2)=8^2x+1 extraneous root sorry for the re post, i typed it wrong

*asked on March 31, 2017* -
## math

given f(x) = x^2 and g(x)= squar root x+4. determine the following compostions and their doamin and range a) f(g(x)) b) g-1(superscript) (f(x)) c) g(f(x)) +g-1(superscript)(f(x))

*asked on March 31, 2017* -
## math

log(subscript)2 (x+5) + log(subscript)2 (x-1) =4 find the extraneous root

*asked on March 31, 2017* -
## math

The pH or acidity of liquid is measured in pH, where pH is given by the equation pH=- log C, with C being the concentration of [H+] in multiples of M=1mol/L. Suppose you are given a solution of hydrochloric acid with a pH of 1.7 and asked to increase the

*asked on March 31, 2017* -
## math

15(5x-2)=82x+1 solve the extraneous root

*asked on March 31, 2017* -
## math

A polynomial function function is defined by the equation p(x)=3x3+ax2+bx+7, where a, bE/. If p(-2)=5 and p(1)=14 then the value of a+b is...

*asked on March 31, 2017* -
## Advanced Functions

4cos2x - cosx-3 =0 0 to 2pi

*asked on March 31, 2017* -
## chemistry

The pH or acidity of liquid is measured in pH, where pH is given by the equation pH=- log C, with C being the concentration of [H+] in multiples of M=1mol/L. Suppose you are given a solution of hydrochloric acid with a pH of 1.7 and asked to increase the

*asked on March 31, 2017* -
## Advanced Functions

the compound interst forumla is A= P(1+i)^n. consider the function in the form of y= 100(1+x/2)^20, where y is the compound amount. a) determine the required annual interest rate of investment to the nearest tenth of a percentage of 10 years that will give

*asked on March 31, 2017*