Wednesday

November 25, 2015
Number of results: 74,392

**chemistry**

A reaction is represented by this equation: 2W( aq ) ⇌ X( aq ) + 2Y( aq ) K c = 5 × 10 −4 (a) Write the mathematical expression for the equilibrium constant. (b) Using concentrations of ≤1 M , make up two sets of concentrations that describe a mixture of W, X...
*November 16, 2015 by mayuri*

**SAVE ME ( MATH)**

function p(t) has a domain of 1 less than or equal to t less than or equal to 12 range of -40 < p less than or equal to 160 Find the domain and range for. Enter the exact answers A) P(1/4t+4) B) -1/10p(2t)+46
*October 17, 2014 by Randy*

**Algebra**

Use the five steps for problem solving to answer the following question. Please show all of your work. Marissa has budgeted $65 for her monthly cell phone expense. If her plan with her wireless provider is $15 plus $0.25 for each minute, how many minutes can she talk on her ...
*June 3, 2011 by Steve*

**Biology**

In man, muscular dustrophy , is inherited as a sex linked recessive , a couple , both of whom are normal, have five children, three boys and two girls , the oldest boy is beginning to show symptoms of the disease, what could you tell them about the chances of their children ...
*October 26, 2011 by Melissa*

**trig**

Use an addition or subtraction formula to write the expression as a trigonometric function of one number: tan75degrees-tan15degrees/1+tan75tan15=tanAdegrees =square root B Its asking for the value of A and B. I know A =60 degrees, what I can't figure out is B, I dont ...
*November 15, 2008 by Natash*

**precalc**

Suppose the value of quantity A changes from a starting value of x to a final value of y. Write an expression using x and y that computes the resulting change of quantity A.
*September 6, 2013 by BeeBee*

**Math**

Ms.abbot went on a road trip. The trip was 792 miles and the average price of gasoline was $1.30 per gallon. What information is needed to to find the amount spent on gasoline for the trip? A. Number of hours the trip took B. Number of miles per hour the car traveled C. ...
*April 13, 2011 by Mathisthebest*

**CALCULUS!**

suppose that 3 <_ f prime of x <_ 5, for all values x. show that 18<_ f(8)-f(2) <_ 30 <_ signs mean less or equal to... im supposed to apply mean value theorem or rolle's theorem... i dont understand neither so i cant do the question! please help!
*November 10, 2007 by Matthew*

**math**

you roll a number cube. what are the odds in favor of rolling a 1 or a 5?thanks. There are 6 sides of a cube. You want one of 2 numbers to show up. So it's 2/6 chance....or 1/3 Matt I assume that you are talking about a die (Singular for "dice"), it has a total of 6 sides. ...
*April 13, 2007 by dillon*

**Math 112**

A class of 23 students was using square tiles to build rectangular shapes. Each student has more than one tile and each has a different number of tiles. Each student was able to build only one rectangular shape. All tiles had to be used to build the rectangle and the rectangle...
*March 21, 2013 by ENIS*

**financial alg**

Forrest purchased a car for $20,640. He made a down payment of $2,440. He applied for a five-year installment loan with an interest rate of 10.4%. What is the total cost of the car after five years?
*May 12, 2013 by Janae*

**keybording and word processing**

1. When keying, it's important that you keep your eyes on the A. computer monitor. B. source copy. C. keyboard. D. home row keys. 2. In the inside address of a letter, how many times do you space after a period following the abbreviation Ms.? A. None B. One time C. Two times D...
*July 13, 2008 by martha*

**calc and vectors**

The following table displays the number of HIV diagnoses per year in a particular country. Year 1997 1998 1999 2000 2001 2002 2003 2004 2005 Diagnoses 2512 2343 2230 2113 2178 2495 2496 2538 2518 Using Curve Expert or another curve modelling program, determine an equation that...
*January 10, 2014 by court*

**algebra**

You had 207.00,but spend 2.00each day which algebraic expression describes the situation,where d represents the number of days ? Answers are 207+d, 205d, 2+207d, 207-2d
*February 15, 2014 by molly*

**Computer programming**

How to build a simple game in java that will allow a player to attempt to guess a randomly generated number between 0 and 10. The player can continue guessing the number until they get it right. The game should be able to do these things: 1. Game should remember each choice ...
*October 6, 2014 by Eric*

**7th grade math**

Sally makes an ice cream sundae. She can choose from vanilla, chocolate, or strawberry ice cream, fudge or caramel topping, and sprinkles or nuts. Write an expression to show how to find all the different combinations. I'm not sure how to do this. Any help would be appreciated.
*March 29, 2011 by hunter*

**7th grade math**

Sally makes an ice cream sundae. She can choose from vanilla, chocolate, or strawberry ice cream, fudge or caramel topping, and sprinkles or nuts. Write an expression to show how to find all the different combinations. I'm not sure how to do this. Any help would be appreciated.
*March 29, 2011 by hunter*

**Statistics**

A loaded coin is tossed 5 times, find the probability distribution for the number of heads, if heads are thrice likely to occur than tails. Let x be the number of heads that will turn up. Compute the probability associated to each value of X using the equation: x=0,1,2,3,4,5 P...
*July 25, 2011 by Sapphire*

**Math (Statistics)**

How do I go about tackling this problem? The American Medical Association wishes to determine the percentage of obstetricians who are considering leaving the profession becaose of the rapidly increasing number of lawsuits against obstetricians. How large a sample should be ...
*April 29, 2007 by Edward*

**Science**

What Element am I? My properties are very similiar to sodium. I am lighter than the element that has an atomic number one less than mine.
*February 24, 2011 by mary k.*

**ALG2! WORD PROBLEM!**

define a variable and write an inequality for each problem.then solve. Nineteen more than a number is less than 42.
*October 4, 2012 by tyneisha*

**math**

I ONLY HAVE ONES AND TENTHS DIGITS. I AM LESS TAHN 9. ONE OF MY DIGITS IS 3 MORE THAN THE OTHER. WHAT NUMBER AM I?
*January 13, 2013 by jericho*

**Math**

Mack rolls a 15-sided cube 45 times, what would you predict the probability to be of Mack's rolling a number less than 5?
*April 29, 2014 by Neid*

**fractions**

When Kaitlin divided a fraction by 1/2, the result was a mixed number. Was the original fraction less than or greater than 1/2? Explain reasoning. THANK YOU!
*September 17, 2014 by Kymmy*

**math**

When Kaitlin divided a fraction by 1/2,the result was a mixed number.Was the original fraction less than or greater than 1/2? Explain your reasoning
*October 7, 2014 by Ali*

**math**

I am a positive integer less that 30, two more than my value is a mulitple of 6 the sum of my digits is a mulitple of 7 find this number
*February 13, 2015 by alexis*

**Algebra**

Directions say that I have to solve and graph the equation using words.I have to include whether the lines are dotted or solid, how to graph each of them and where the solution is shaded. 2x-3y>_9 and -x-4y>_8 both should be solid, because the solution is greater than OR...
*June 12, 2007 by Erica*

**Math**

In 1997, a typical American consumed 52 liters of bottled water, and in 2001, a typical American consumed 74 liters of bottled water. Let y be the number of liters of bottled water consumed by a typical American in the year x, where x = 0 represents the year 1997. (a) Which of...
*March 8, 2014 by Shelly*

**Function**

Fahrenheit and Celsius are two measures of temperature. The temperature in degrees Celsius is equal to five ninths of 32 less than the temperature in degrees Fahrenheit. What is a function rule that represents this situation?
*May 6, 2013 by Anon*

**math**

A square storage area measures 10 m on a side. By how much must each side be shortened to decrease this area to less than half the original area? (3 marks - show your work)
*January 22, 2015 by Alex*

**math**

A square storage area measures 10 m on a side. By how much must each side be shortened to decrease this area to less than half the original area? (3 marks - show your work)
*January 26, 2015 by Alex*

**maths**

In the year 2000 there were 350 mobile phones users living in the small town of Phoneville. Since 2000 the number of residents using mobile phones has increased by 25% each year, that is, each year the number of mobile phones increases by a factor of 1.25 Calculate, to three ...
*May 8, 2011 by Stephanie*

**Intermediate Algebra (math)**

(8x^2y^2+4xy^2-12y^2) ÷ 4xy^2 I received this problem. I was told to divide the rational expression. The problem I am having is I feel like something is missing. I only understand to divide rational expressions we take the first rational expression and multiply it by the ...
*September 17, 2015 by Steph*

**Intermediate Algebra (math)**

(8x^2y^2+4xy^2-12y^2) ÷ 4xy^2 I received this problem. I was told to divide the rational expression. The problem I am having is I feel like something is missing. I only understand to divide rational expressions we take the first rational expression and multiply it by the ...
*September 17, 2015 by Steph*

**Algebra**

A class of 23 students was using square tiles to build rectangular shapes. Each student had more than 1 tile and each had a different number of tiles. Each student was able to build only one shape of rectangle. All tiles had to be used to build a rectangle and the rectangle ...
*September 24, 2014 by KG*

**Math 112 Help pelase**

A class of 23 students was using square tiles to build rectangular shapes. Each student has more than one tile and each has a different number of tiles. Each student was able to build only one rectangular shape. All tiles had to be used to build the rectangle and the rectangle...
*March 23, 2013 by Enis *

**Mathematics**

1. Show that Sin3 Theta - Cos2 Theta = (1 - Sin Theta)(4Sin^2 Theta + 2Sin Theta - 1). Without using a calculator, show that Theta = 18 degrees is an exact solution of the equation Sin3 Theta = Cos2 Theta. Justifying your answer, find the exact values of: i) Sin18 degrees. ii...
*August 3, 2011 by Edwards*

**English expression**

1. He did his presentation in the period. 2. He did two presentations this week in front of other co-workers. 3. I had to pay some amount of service money for using the ATM. 4. In a bank we can join a fund product. ===================================== Are the sentences above ...
*October 27, 2007 by John*

**math**

This was on my 5th grader's homework: what is the least number you can make using all of the digits from 0 through 9 exactly once? My answer was 1,023,456,789. The teacher says it's 0,123,456,789. I think that if the zero is the first digit, it's not actually part of the ...
*August 21, 2012 by stick*

**fiance 200**

How do I set this up? What do I do? I'm really confused on what to do. Please Help! · Complete using the financial statement below to calculate the 13 basic ratios found in the chapter. There is NO need to repeat the financial statements in your assignment. Just show the ...
*March 30, 2010 by annonomous*

**Calculus--complex numbers**

let z= a+bi be a complex number. it is given that the quotient (z-i)/(z-1) is purely imaginary. show that z lies on a circle and determine the centre and radius of this circle. OK, here's my working out...( i am using "X" as my times symbol) step1: (a+bi-i)/(a+bi-1)X[(a-1)-bi...
*March 12, 2008 by Anne*

**physics**

A double slit diffraction pattern is formed on a distant screen using mercury green light of wavelength 546.1 nm. Each slit has a width of 0.1 mm. The pattern shows that the 4th order interference maximum is missing. a) What is the separation of the slits? b) What is the ...
*April 2, 2010 by Sandhya*

**MATH HELP! LAST QUESTION!**

Hallie is trying to win the grand prize on a game show. Should she try her luck by spinning a wheel with 6 equal sections labeled 1 to 6 and hope she gets a 5, or should she roll two number cubes and hope she gets the same number on both cubes? Explain.
*May 18, 2015 by Anon101*

**calculus**

I got half of this problem wrong and I DO NOT know where and how to fix. I cannot use my calculator and have to show my work. Question: You have a 500 metre roll of fencing and a large field. You want to construct a rectangular playground area. a.) using optimization ...
*December 18, 2013 by jj*

**MTH213 - **

A two-digit number has the property that the units digit is 4 less than the tens digit and the tens digit is twice the units digit. What is the number?
*January 19, 2011 by Jonathan*

**math**

A two digit number has the property that the units digit is 4 less than the tens digit and the tens digit is twice the units digit. What is the number?
*February 18, 2013 by Dee*

**Math**

A two digit number has the property that the units digit is 4 less than the tens digit and the tens digit is twice the units digit. What is the number?
*September 14, 2013 by Paisley*

**math**

In an ordered (A – K, ♠♢♣♡) 52 card deck, using JUMP SEARCH, looking for the queen of hearts, a. What is the optimum jump size k? b. How many probes (m) will it take with the optimum jump size? c. What is the worst case number of comparisons using k and...
*July 14, 2014 by Raymond*

**Data Management**

Stuck with 2 questions. Need of assistance before tomorrow. Question 1. A summer camp has seven 4.6m canoes, ten 5.0m canoes, four 5.2m canoes, and four 6.1m canoes. Canoes are assigned randomly for campers going on a canoe trip. a) Show the probability distribution for the ...
*December 21, 2006 by Aurora*

**Trig**

Solev the equation for t if 0 is less than or eual to t which is less than 2 pi 7sin + radical3 = 5 sin t
*March 13, 2008 by Selma*

**Math/Trig**

Solve: 2 cos2 x - 3 cos x + 1 = 0 for 0 is less than or equal to x is less than 2pi.
*January 20, 2011 by CJ*

**Art**

Artists make shapes in the background smaller than shapes in the foreground to communicate their distance from the viewer. How else might a landscape artist show shapes in the background to depict their distance from the viewer? A. Show shapes with bright colors. B. Show ...
*April 14, 2015 by Dawn*

**math inequality**

13-3m (< = ) –4m is 13-m greater than or eual to -4m No. < means less than. 13-3m is less than or equal to -4m.
*November 29, 2006 by kirsty*

**math riddles**

i am greater than 30 and less thean 40. the sum of my digits is less than 5. who am I?
*April 15, 2009 by desirea*

**algebra**

how would you graph y=x^2(-3 is less than or equal to x is less then or ewqual to3)
*February 7, 2012 by jahnay *

**maths**

solve 2cos(2theta-pi)= -2 , -2 pi less or equal to theta less than 2 pi
*May 17, 2015 by haile*

**math**

ol' santas pack held thirty toys made by his elfin crew; and though none made the same amount, each elf made more than two. the elf named cher made one more toy than the elf who dressed in reds, but cher made one less christmas toy than the elf who made the sleds. spry johnny ...
*December 29, 2008 by Sabeva*

**MATH**

1. Write a formula to express the relationship for: The number of cents, c, to be received from a one-dollar bill is equal to 100 decreased by the price of the article purchased, p, when p is less than $1.00
*July 8, 2008 by LILY*

**Art**

Artists make shapes in the background smaller than shapes in the foreground to communicate their distance from the viewer.How else might a landscape artist show shapes in the background to depict their distance from the viewer? A.Show shapes with bright colors B.Show shapes ...
*March 27, 2015 by CookieMonster*

**L.A. :|**

why does the author of always to remember discuss maya ying lin's background? A. to show that she expericenced hardship. B. to show it's influence on her design. C to appeal to Chinese-American readers. D. To show she dis interest in architecture.
*November 2, 2015 by Emo Nerd :/*

**Social STUDIES**

the 15 amendment - ratified in 1870 prohibited states from using race or color as standards for determining the right vote the 19th amendment- ratified 1920 prohibited the states from using gender as a voting qualification the 23 amendment- ratified in 1961 granted the ...
*July 7, 2011 by Anonymous***

**Math grade 12**

write the partial fraction decomposition of the following rational expression ( hint: binomial expansion with Pascal triangle can be used to expand binomials. technology may be used to solve large systems using matrices or determinants) 4 ------------------------------------- ...
*January 1, 2012 by Rass*

**Algebra**

Bob thanks for answering my question, it still seems a tad bit confusing as i was thinking to use a quadratic expression formula. the formula you used is a rational expression correct??
*November 10, 2009 by Stacy*

**8th grade**

Hi my class is doing a unit on patterns with algebraic expressions. And i need to find a difficult expression Figure# Term value 1 8 2 27 3 64 4 125 what is the algebraic expression and how did u do it? thank you. Math-Nick
*November 22, 2009 by Nick*

**algebra**

Use properties of logarithms to condense the logarithmic expression. Write the expression as a single logarithm whose coefficient is 1. Where possible, evaluate logarithmic expressions. 4logbx - logby
*December 5, 2014 by ada*

**chemistry**

10.0 moles of NH3 and 10.0 moles of H2 are introduced into a 1.00 L flask. At equilibrium, 3.0 moles of NH3 gas remain. Calculate Kc for this reaction. N2(g) + 3H2(g) < > 2NH3(g) sorry i forgot to say show all the work please! We usually don't do the whole problem. The ...
*August 5, 2007 by patrick*

**algebra**

Replace the equation in which the variable of the expression appears only once with a positive positive number for its exponent. (16x^2)/(16x^5)
*September 28, 2015 by Kaitlyn*

**algebra**

A bank teller has t dollars, all in $5 bills. What expression represents the number of $5 dollar bills the teller has?
*January 11, 2012 by Anonymous*

**expression**

the same same number of birds, b, sitting on three different wires, then 9 birds fly off
*October 14, 2012 by tonkie*

**elementary**

geometry a figure has 3 more sides than a pentagon.write an expression for the number of sides the new figure has.
*October 29, 2012 by swetha*

**Algebra Answer Check**

What is the algebraic expression for the following word phrase: the quotient of 6 and the sum of 5 and y? 6 a. ----- 5-y 6 b. ----- (?) 5+y c. 6(5+y) d. 6/5 + 6y What is the algebraic expression for the following word phrase: the quotient of j and 8? a. j-8 b. j+8 c. j...
*September 21, 2013 by Anonymous*

**Math**

X is less than or equal to 4. OR X is greater than or less than 10. Is it a segment, line, or one or more rays?
*November 18, 2010 by Sean*

**Math/Trig**

Solve: sin x - 2sin x cos x = 0 for 0 is less than or equal to x is less than 2pi.
*January 20, 2011 by CJ*

**geometry**

x is less than y and 20 less than z. write a system of equations and find the measures of the three angles
*November 7, 2011 by davonte*

**6th grade math**

Is -15 equal then to 15 or less then? My answer is less then an i right if not please tell me how and why?
*January 15, 2013 by Miki*

**Physics**

Problem:: A 4.80 kg block located on a horizontal frictionless floor is pulled by a cord that exerts a force F=13.5 N at an angle q= 17.5° above the horizontal. What is the speed of the block 3.90 seconds after it starts moving? What I've got:: Using sin and cos, I've got that...
*November 20, 2009 by Christine*

** Statistics**

Suppose we have yo estimate the average number of purchases in a given hour in a given hour at a convenient store. Using this example describe in your own words how you would go about this determining this average through: A.) Drawing a random sample B.) A Systematic sample C...
*February 9, 2015 by Phyiss*

**Biology**

How is the expression of sex-linked genes similar to the expression of autosomal genes?
*October 21, 2009 by Alex*

**algebra**

Find an equivalent expression with the given denominator 4/n=?/n 2power. The expression that is equivalent to 4/n is
*June 17, 2011 by Maria*

**Algebra**

Simplify the rational expression and write the restriction for the simplified rational expression. x^3 - 8 ----------------------- x^2 + xy - 2x - 2y
*August 5, 2012 by Anne*

**Math**

For a set of scores, will the interquartile range always be less than the range? Explain your answer with an example. I know the range runs from the lowest to the highest score. What would be a good example to show this?
*October 27, 2009 by Anonymous*

**random**

what kind of website is this? what is jiskha? Jiskha is the name given to the site by the man who runs the show here. His name is Leo. This is a help site with the emphasis on help. We try to help students do their homework. But we like to see what the student can do, then we ...
*January 18, 2007 by cc*

**chem**

Using electronegativity arguments, classify the following diatomic molecules as nonpolar (N), polar (P), or ionic (I), and enter five letters in order (e.g. NPNPI, INPNP, etc) : NaF, HF, NaH, CaO, and F2. Look up electronegativity (EN)of each element and subtract to obtain a ...
*October 5, 2006 by maria*

**math**

Assume that you start with $900 per month healthcare increase and add five percent(5%) per year for the two (2) remaining years of a three year contract. Show the cash value and roll-up value of the increase
*December 20, 2010 by Rochelle*

**geomatry**

write the first 5 term in the sequence that represent this situation. each term should indicate the total number of students that can sit around one, two, three, four, and five tables. explain your reasoning.
*November 29, 2012 by annoymose*

**math**

Explain how you could use the Pythagorean Theorem to find the distance between the points the coordinate pair negative four comma negative three and the coordinate pair one comma one. Find the distance. You can type carat two to indicate "squared" and "sqrt" to indicate "...
*August 20, 2011 by drea*

**statistics**

The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25 and 50? d. what is the ...
*November 26, 2012 by Ashley*

**statistics**

The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25 and 50? d. what is the ...
*November 26, 2012 by Ashley*

**statistics**

The average scuba diver can stay under water for 42 minutes with a standard deviation of 8 minutes.(show graph) B. what is the probabilty that a diver stays under for the less than 53 minutes? c.what is the probabilty that a diver stays under between 25 and 50? d. what is the ...
*November 26, 2012 by Ashley*

**Math **

Which expression represents the larger number? A. 40.1 x 10 to the -6 power B. 4.1 x 10 to the -7 power C. 0.411 x 10 to the -6 power D. 0.04001 x 10 to the -5 power I got A, but I'm not quite sure if it's the right answer :/
*March 28, 2011 by Melanie*

**math**

The expression 5n+2 can be used to find the total cost in dollars of bowling where n is the number of games bowled. How much will it cost to bowl 3 games.
*September 5, 2012 by harley*

**math**

study the function table below. vases flowers 4 12 7 21 8 24 11 33 v f Which expression could be used to find the number of flowers(f) IN (v) vases My answer is A.Is that correct?
*February 10, 2013 by vera*

**math**

study the function table below vases flowers 4 12 7 21 8 24 11 33 v f which expression could be used to find the number of flowers (f) in (v) vases? my answer is a. is that correct
*February 11, 2013 by vera*

**Stats**

3. A mail order magazine service has the exclusive subscription rights to a certain magazine. Subscriptions can be reserved for one, three, four or five years. A study of the subscriber list for other similar magazines reveals that the following information regarding the ...
*March 10, 2014 by Cel*

**pre-algebra**

show that the number is rational by writing it as a quotient of two integers. 1. 24 2. 5 7/18 3. 1 4. 0.3 im not so sure what your suppose to do
*January 6, 2009 by Christa*

**Math**

Calculate the distance between the points -2/3 and 3/4 on the number line. Please show how you come to the answer.
*June 2, 2009 by Breanna*

**Algebra**

Calculate the distance between the points -2/3 and 3/4 on the number line. Please show how you arrived at the answer.
*June 4, 2009 by Michelle*

**Precalculus(URGENT)**

Number of possible turning points in the following equation f(x)=x^2(x-3)(x+4) show work please
*March 11, 2010 by Arielt*

**Chem**

what is the oxidation number on each of these ions - Ag2S + 2Al - 6Ag + Al2S3 Can you show your work? Thanks a bunch:)
*May 9, 2010 by Stacey*

**alegebra**

Find a counterexample to show the statement is false. the whole number s are closed under division.
*September 17, 2010 by zully*