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November 23, 2014

Homework Help: Math

Branches of Math

Recent Math Questions

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Math
What is 36 over 156 in simplest form?
Wednesday, June 26, 2013 at 1:04pm

math
The HR department of an organization collects data on employees¿ age, salary, level of education, gender, and ethnicity. Which data do you think is more likely to follow normal distribution? Explain why.
Wednesday, June 26, 2013 at 12:25pm

Math (Quadratics)
If the quadratic equation for x {1+(a+b)^2}x^2−2(2a+2b+1)x+5=0 has real roots, what is the value of a^3+b^3+6ab+a+b?
Wednesday, June 26, 2013 at 10:41am

Math (Quadratics)(Discriminants)
If a is a real number and a cubic equation f(x)=x^3−8x^2+(a+12)x−2a has a repeated root, what is the sum of all the possible values of a?
Wednesday, June 26, 2013 at 10:39am

math
x^2+3x-10 divided by x-2
Wednesday, June 26, 2013 at 10:33am

math waaaaarning
Find the sum of all primes q<1000 such that for some prime p<q , both q divides p^3-1 and p divides q^3-1
Wednesday, June 26, 2013 at 9:58am

math help
Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9 y 3 2 6 1 3 3 3 2 5 3 (a) Find the equation of the line of best fit. y hat = + x (ii) Graph this equation on a scatter diagram. (Do this on paper. Your ...
Wednesday, June 26, 2013 at 9:52am

math
(2x+3y)^(3/2)
Wednesday, June 26, 2013 at 9:44am

Math (Combinatorics)
40 students attended the brilliant summer camp at Stanford University. "k" of the students at the camp are working on math problems and the others are working on non-math problems. One of the camp mentors noticed that whenever all the students were partitioned into 2...
Wednesday, June 26, 2013 at 9:23am

Math
Martin wants to make a scatter plot comparing the temperature outside with the number of people at the city swimming pool. Which of the following trends would most likely represent the data? A/There is no relationship between the temperature and the number of people at the ...
Wednesday, June 26, 2013 at 8:46am

math help
question says choose which is greater or are they equal or not enough info fifty percent can be represented by n --- 50 a. n b. 45 answer is b is greater please tell me why
Wednesday, June 26, 2013 at 8:24am

math 4 grade
question which is greater - are they equal - or not enough info 18K 17K the answer says its not enough info but 18 is always bigger than 17
Wednesday, June 26, 2013 at 6:58am

heeeeeeelp math
Find the sum of all primes q<1000 such that for some prime p<q , both q divides p^3-1 and p divides q^3-1
Wednesday, June 26, 2013 at 4:03am

math
the sum of numerator and denominator is 3 less than twice the denominator.If the numerator and denominator is decreased by 1 , the numerator becomes half the denominator.Find the fraction?
Wednesday, June 26, 2013 at 3:50am

math help
the land area of a country with 20 people per square kilomoter or the land area of a country that measures 500,000 square kilometers which is bigger and how did you determine this?
Wednesday, June 26, 2013 at 3:18am

math
let n represent the position of a term in the arithemtic sequence (-2,6,14,22,30,...)
Wednesday, June 26, 2013 at 12:45am

math 4th grade
the land area of a country with 20 people per square kilomoter or the land area of a country that measures 500,000 square kilometers can anyone explain how to do this
Wednesday, June 26, 2013 at 12:09am

math 4th grade
the land area of a country with 20 people per square kilomoter or the land area of a country that measures 500,000 square kilometers can anyone explain how to do this
Wednesday, June 26, 2013 at 12:09am

math 4th grade
the land area of a country with 20 people per square kilomoter or the land area of a country that measures 500,000 square kilometers can anyone explain how to do this
Wednesday, June 26, 2013 at 12:09am

Math question
How do you find the p-value, on a problem like below. The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the coated portion ...
Tuesday, June 25, 2013 at 11:52pm

math
Let A=(0,0), B=(2,4), C=(17,4) and D=(15,0). Then ABCD is a parallelogram. A line through the point (0,−1) divides the parallelogram into two regions of equal area. The slope of this line can be written as a/b where a and b are positive coprime integers. Find a+b.
Tuesday, June 25, 2013 at 11:36pm

Math
If P(F)=0.3, P(E or F) =.65 and P(E and F)=.15, find P(E)
Tuesday, June 25, 2013 at 8:53pm

math
A market research company surveyed 2500 teenage cell phone owners. The company learned that 4/5 of them use cell phone data services. How many teenagers surveyed use cell phone data services?
Tuesday, June 25, 2013 at 8:14pm

Math
Grace is building a brick wall along her driveway. She estimates that one row of brinks plus mortar will be 2 3/8 inches high. How many rows will she need to construct a wall that is 57 inches high?
Tuesday, June 25, 2013 at 8:07pm

Math
Assuming lambda=0.02 and t=50, compute P(2)
Tuesday, June 25, 2013 at 7:45pm

math
A chocolate cookie recipe that makes 24 cookies uses 3/4 cups of brown sugar. If John wants to make 72 cookies, how much brown sugar does he need?
Tuesday, June 25, 2013 at 7:44pm

Math
A cylinder has a radius of 2 feet and a height of 18 feet. Volume (to the nearest tenth) = a0 cubic feet i TRIED to work out this problem. The answer I got was 226.3 I used the cylinder volume formula which is π r2 h.! The computer says my answer is wrong. what am I doing...
Tuesday, June 25, 2013 at 7:33pm

business math
tony towing borrows of $12,250 at 9.5% interest for 320 days if bank use exact interest method how much interest will the bank collect? Round to nearest cent
Tuesday, June 25, 2013 at 7:25pm

Math
You are paneling an office that has 2 walls measuring 18' x 8' and 2 walls measuring 9' x 8'. How many sheets of paneling will you need, assuming each panel sheet measures 4' x 8'?
Tuesday, June 25, 2013 at 7:17pm

Math
V = 4/3r3. A sphere has a radius of 4 inches. Volume (to the nearest tenth) = cubic inches The answer I got was 261.2 but it was wrong.
Tuesday, June 25, 2013 at 7:15pm

Math
What is the range of values of the probability of an event?
Tuesday, June 25, 2013 at 6:51pm

Math
Compute the square footage of carpet needed to cover a room 10' 6" x 12' 3". Area (to the nearest tenth) = square feet. Can you explain the steps on how to solve this problem.
Tuesday, June 25, 2013 at 6:39pm

math
Solve: f(x)=7x^6=1
Tuesday, June 25, 2013 at 4:48pm

math
find the critical points of h(t) = (t^2-4)^(1/3)
Tuesday, June 25, 2013 at 4:31pm

math
calculate the general antiderivative of f(x) = -19x^4 - 15x^3 + (20/x)
Tuesday, June 25, 2013 at 4:30pm

Math
limit as x approaches 9 of (8/(sqrt(x)-3)) - (48)(x-9)
Tuesday, June 25, 2013 at 4:06pm

Math help
Consider the following table and use the formulas that are given for computing the correlation coefficient. (Give your answer correct to two decimal places.) x 1 1 0 0 0 y 7 3 5 6 6 r = n xy − x y n x2 − x 2 n y2 − y 2 (1) r = SS(xy) SS(x) · SS(y) (2) ...
Tuesday, June 25, 2013 at 3:22pm

Math
Alec, Kate and Ketan are roommates who share living expenses in a ratio of k: 2a: 5k respectively. If their total expenses each month equal $1400, how much is Ketan's monthly contribution? (A) 280/2a+6k (B) 700/2a+6k (C) 1400k/2a+6k (D) 2800a/2a+6k (E) 7000k/2a+6x Please ...
Tuesday, June 25, 2013 at 3:05pm

math
any help appreciated on this one, none of us can get it right. Consider the following ANOVA experiments. (Give your answers correct to two decimal places.) (b) Determine the critical region and critical value that are used in the classical approach for testing the null ...
Tuesday, June 25, 2013 at 2:47pm

math check
Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.) Sample Number Mean ...
Tuesday, June 25, 2013 at 2:03pm

math
Find the value of z that would be used to test the difference between the proportions, given the following. (Use G - H. Give your answer correct to two decimal places.) Sample n x G 386 327 H 414 321
Tuesday, June 25, 2013 at 2:01pm

math
the class is 50 students 30 like chocolate, 25 like vanilla, and 18 like both, which like neither.
Tuesday, June 25, 2013 at 1:31pm

Math
If the temperature is 42 degrees at a.m and it goes up to 68 degrees at noon,how many degrees warmer is it?
Tuesday, June 25, 2013 at 12:46pm

Math check
Find the critical value for the hypothesis test, given the following. (Give your answer correct to two decimal places.) Ha: ó1 > ó2, with n1 = 8, n2 = 10, and á = 0.025 F = 2.24 I did it this way and it comes up wrong 1-0.025=0.975/2=.4875 looked up on ...
Tuesday, June 25, 2013 at 12:45pm

Math
Irf the temperature is 42 degrees at a.m and it goes up to 68 degrees at noon,how many degrees warmer is it?
Tuesday, June 25, 2013 at 12:43pm

Math
Tim wants to model a doll house from a real house that measures 60 feet in length by 28 feet in width. He decides to use a scale in which ¼ inch equals 1 foot. Based on this scale, What will be the length of the longer side of Tim's model? inches What will be the ...
Tuesday, June 25, 2013 at 11:31am

Math
Tim wants to model a doll house from a real house that measures 60 feet in length by 28 feet in width. He decides to use a scale in which ¼ inch equals 1 foot. Based on this scale, What will be the length of the longer side of Tim's model? inches What will be the ...
Tuesday, June 25, 2013 at 10:55am

Math
A vehicle covers 2,160 miles in 5.5 hours. What is the average speed of the vehicle to the nearest tenth. I got 55.5, but I don't think it is correct.
Tuesday, June 25, 2013 at 10:54am

math
Consider the following set of data. (18, 12), (29, 48), (65, 29), (82, 24), (115, 56), (124, 13) (a) Calculate the covariance of the set of data. (Give your answer correct to two decimal places.) Incorrect: Your answer is incorrect. . (b) Calculate the standard deviation of ...
Tuesday, June 25, 2013 at 10:50am

math
Consider the following bivariate data. Point A B C D E F G H I J x 3 4 2 1 7 2 1 0 4 2 y 1 7 3 3 6 6 5 0 6 2 (a) Construct a scatter diagram of the given bivariate data. (Do this on paper. Your instructor may ask you to turn in this work.) (b) Calculate the covariance. (Give ...
Tuesday, June 25, 2013 at 10:49am

math help
Complete the hypothesis test with alternative hypothesis ƒÊd ‚ 0 based on the paired data that follows and d = O - Y. Use ƒ¿ = 0.01. Assume normality. Oldest 188 174 192 196 65 Youngest 186 168 199 199 69 (a) Find t. (Give your answer correct ...
Tuesday, June 25, 2013 at 10:44am

math
The corrosive effects of various soils on coated and uncoated steel pipe was tested by using a dependent sampling plan. The data collected are summarized below, where d is the amount of corrosion on the coated portion subtracted from the amount of corrosion on the uncoated ...
Tuesday, June 25, 2013 at 10:40am

math
express each answer in exponential form using the indicated bases 4x4x4x4,base 2
Tuesday, June 25, 2013 at 5:49am

math
ABC is a triangle with AC=139 and BC=178. Points D and E are the midpoints of BC and AC respectively. Given that AD and BE are perpendicular to each other, what is the length of AB?
Tuesday, June 25, 2013 at 5:22am

Discreet math
[(pvq)^(p=>)^(q=>)]=>r[(pvq)^(p​=>)^(q=>)]=>r
Tuesday, June 25, 2013 at 1:08am

Math
I have a question my brother asked me but I need a math expert. You have two interlocking circles and the radius of circle B goes through the center of circle A and of course the radius of circle A goes through the center of circle B. The radius of each circle is 30 feet. Now...
Tuesday, June 25, 2013 at 1:03am

Math
Solve x+y=-1 X-y=-7
Monday, June 24, 2013 at 9:48pm

Math
Chris Shopper received a $800 discount loan to purchase a washer and dryer. The loan was offered at 10% for 120 days. What are the proceeds? I tried this problem and the answer is not 26.40
Monday, June 24, 2013 at 8:01pm

math
The law of cosines can't be used when which of the following combinations of information is given?
Monday, June 24, 2013 at 7:18pm

Math
Find the area shared by the cardioids r=6(1+cos(theta)) and r=6(1-cos(theta))
Monday, June 24, 2013 at 7:15pm

Math
Find the area inside the lemniscate r^2=150cos(2theta) and outside the circle r=5sqrt(3). Please I really need help.
Monday, June 24, 2013 at 7:13pm

Math
I need help with this I keep putting the numbers in wrong on the formula ! PLEASE HELP Price of article = $315.50 Down payment = $31.55 Monthly payment amount = $16.50 Duration of payments = 20 months True annual interest rate to the nearest tenth = % Formula: I(Interest)= 2YC...
Monday, June 24, 2013 at 6:36pm

math
Walnuts sell for $10 per pound and pecans for $18 per pound. How much of each type of nut would produce 40 pounds of a mix that sells for $15 per pound?
Monday, June 24, 2013 at 4:41pm

math
Children's tickets to a movie cost $7. Adult tickets cost $12. If 275 tickets were sold for a total of $2490.00, how many of each type were sold?
Monday, June 24, 2013 at 4:18pm

math
A brick wall measuring 3 ft by 11 ft is to be built. The brick measures 4in by 6 in. How many bricks will it take to complete the walkway? math - Ms. Sue, Monday, June 24, 2013 at 2:39pm Are we building a wall or a walkway? math - iris, Monday, June 24, 2013 at 2:41pm walkway
Monday, June 24, 2013 at 4:08pm

math
y+3x^2=2 f(x)= f(4)=
Monday, June 24, 2013 at 4:03pm

algebra
I have no idea totally lost haven't done any type of math in almost 30 years f(x)= x^4-x^3-7x^2+x+6 all the real roots are bounded by -3 and 4. Explain why these are the upper and lower bounds
Monday, June 24, 2013 at 3:41pm

math
the square root of 0.0256/25
Monday, June 24, 2013 at 3:39pm

math help
Find the 95% confidence interval for the difference between two means based on this information about two samples. Assume independent samples from normal populations. (Use conservative degrees of freedom.) (Give your answers correct to two decimal places.) Sample Number Mean ...
Monday, June 24, 2013 at 3:06pm

math
89___89 the second 89 has a solid line on top of the number. Is this equal or greater than or equal to 89 without the line
Monday, June 24, 2013 at 2:40pm

math
A brick wall measuring 3 ft by 11 ft is to be built. The brick measures 4in by 6 in. How many bricks will it take to complete the walkway?
Monday, June 24, 2013 at 2:37pm

math
Children's tickets to a movie cost $7.00. Adult tickets cost $12.00. If 1275 tickets were sold for a total of $2490.00, how many of each type were sold?
Monday, June 24, 2013 at 2:15pm

Math-algebra-Steve
The sequence {an} satisfies a0=1,a1=213, and an=2an−1+an−2 for all n≥2. Let S=∑i=1 to infinity a[i-1]/(a[i]^2-a[i-1]^2) What is the value of 1/S?
Monday, June 24, 2013 at 2:00pm

Math
Your service contract for washer repair maintenance is offered at $48 per year. If a customer wants to pay it off in equal monthly installments for one year and if the true annual interest charge is 18%, what should his monthly payment be?
Monday, June 24, 2013 at 1:41pm

math
How many ordered positive integer triples (x,y,z), such that 1 ≤ x,y,z ≤ 25, are there to √x+√y=√z?
Monday, June 24, 2013 at 1:40pm

business math
if I deposited $625 in a retirement account per month and it had a return of 3.84% a year compounded monthly. How much will I have in my account in 15 years?
Monday, June 24, 2013 at 1:16pm

math
You have seven balls labelled 1,2,…,7 and seven unlabelled, indistinguishable boxes. How many different ways can the balls be placed into the boxes? Details and assumptions Since the boxes are indistinguishable, putting all 7 balls into one box is the same as putting all ...
Monday, June 24, 2013 at 12:56pm

Math
The sequence {an} satisfies a0=1,a1=213, and an=2an−1+an−2 for all n≥2. Let S=∑i=1 to infinity a[i-1]/(a[i]^2-a[i-1]^2) What is the value of 1/S
Monday, June 24, 2013 at 11:53am

Math
(4k exponent2) exponent5
Monday, June 24, 2013 at 11:41am

math
What is the sum of all possible real values of x, such that there exists a real value y which satisfies the equation (x+y−40)^2+(x−y−18)^2=​0?
Monday, June 24, 2013 at 10:54am

Math
There are 100 runners, each given a distinct bib labeled 1 to 100. What is the most number of runners that we could arrange in a circle, such that the product of the numbers on the bibs of any 2 neighboring runners, is less than 1000?
Monday, June 24, 2013 at 10:43am

Math 61 part 2
Find the centriod of the boundEd by the curvez y=x^2 and y=2x+3
Monday, June 24, 2013 at 9:18am

math
my number has 7 tens and 6 ones. my hundreds digit is the highest of all digits. what is my number?
Monday, June 24, 2013 at 7:01am

math
Let A=(0,0), B=(2,4), C=(17,4) and D=(15,0). Then ABCD is a parallelogram. A line through the point (0,−1) divides the parallelogram into two regions of equal area. The slope of this line can be written as a/b where a and b are positive coprime integers. Find a+b.
Monday, June 24, 2013 at 4:09am

English
1. I got A on the math test. 2. I won A on the math test. (Are both grammatical?)
Monday, June 24, 2013 at 2:34am

Math
A circle of radius 1 is drawn in the plane. Four non-overlapping circles each of radius 1, are drawn (externally) tangential to the original circle. An angle γ is chosen uniformly at random in the interval [0,2π). The probability that a half ray drawn from the centre...
Monday, June 24, 2013 at 1:02am

MATH
6+(4X7/14-1)=7
Monday, June 24, 2013 at 12:37am

math
Your service contract for washer repair maintenance is offered at $48 per year. If a customer wants to pay it off in equal monthly installments for one year and if the true annual interest charge is 18%, what should his monthly payment be?
Sunday, June 23, 2013 at 11:43pm

Math
Price of article = $315.50 Down payment = $31.55 Monthly payment amount = $16.50 Duration of payments = 20 months True annual interest rate to the nearest tenth= %
Sunday, June 23, 2013 at 11:42pm

Math
There are 100 runners, each given a distinct bib labeled 1 to 100. What is the most number of runners that we could arrange in a circle, such that the product of the numbers on the bibs of any 2 neighboring runners, is less than 1000?
Sunday, June 23, 2013 at 11:23pm

Math help
Find the 98% confidence interval for estimating ìd based on these paired data and assuming normality. (Give your answers correct to one decimal place.) Before 50 55 61 52 68 54 After 34 58 56 36 40 39 Lower Limit Incorrect: Your answer is incorrect. 64.0 Upper Limit ...
Sunday, June 23, 2013 at 11:15pm

math/algebra
find the domain of the function 1) f(x)= log2( 49-x^2) 2) f(x)=In [1/x+5]
Sunday, June 23, 2013 at 10:38pm

math/algebra
solve the equation log2(3x-2) - log2 (x-5)=4
Sunday, June 23, 2013 at 10:31pm

math
6) The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 88 inches, and a standard deviation of 10 inches. What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?
Sunday, June 23, 2013 at 10:31pm

math/ algebra
solve the equation log (4x)= log5 + log(x-4)
Sunday, June 23, 2013 at 10:30pm

math
Suppose a student wants to be a millionaire in 40 years. If she has an account that pays 8% interest compounded monthly, how much must she deposit each month in order to achieve her goal of having $1,000,000? What is the present value of this annuity?
Sunday, June 23, 2013 at 10:18pm

math
Can someone give me the formula to work this out, I am not sure. Find the value of t for the difference between two means based on an assumption of normality and this information about two samples. (Use sample 1 - sample 2. Give your answer correct to two decimal places.) ...
Sunday, June 23, 2013 at 10:09pm

(Math)Simplifying using the laws of exponents
I need help with a few problems. 1.) (x^3/4 times y^1/3)^2/3 How is the answer x^1/2y^2/9 2.)(x^-1/3 times y) (x^1/2 times y^-4/3) How is the answer x^1/6 over y^1/3 3.)(4a^2b^-7/2)^1/2 How is the answer 2a over b^3/4 4.) (x^2/3y^-1/3 over 8x^1/2y)^1/3 How is the answer x^1/18...
Sunday, June 23, 2013 at 10:07pm

Business Math
Kiddie Kites buys Japanese kite kits with a list price of $6,500. If the supplier offers trade discounts of 30/15/15, find the trade discount amount to the nearest cent.
Sunday, June 23, 2013 at 9:52pm

math
Can someone please help me on these I have look at the examples and done just what they did, but I still get it wrong and I only have one more time to try. Use the following table to answer the questions. (Give your answers correct to two decimal places.) x 1 1 3 3 5 5 7 7 9 9...
Sunday, June 23, 2013 at 8:57pm

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