Saturday
May 30, 2015

Homework Help: Math

Recent Math Questions

Math
If a wheel turns 9 revolutions per minute and its circumference is 3.77 what speed must a mouse run to stay on top
Thursday, March 26, 2015 at 10:11pm

Math
Kelly has 40 hours of work to do on her fair project . she has 5 weeks to complete it on time?
Thursday, March 26, 2015 at 9:33pm

math
The area of a circle is given by the formula A = ðr2, where r is the radius. If increasing the radius of a circle by 1 inch gives the resulting circle an area of 100ð square inches, what is the radius of the original circle?
Thursday, March 26, 2015 at 9:12pm

Math 115
A manufacture has been selling 1400 television sets a week at $480 each. A market survey indicates that for each$24 rebate offered to a buyer, the number of sets sold will increase by 240 per week. a) Find the price p(x) of each television as a function of x, where x is the ...
Thursday, March 26, 2015 at 9:11pm

Math 115
The manager of a large apartment complex knows from experience that 90 units will be occupied if the rent is 444 dollars per month. A market survey suggests that, on the average, one additional unit will remain vacant for each 6 dollar increase in rent. Similarly, one ...
Thursday, March 26, 2015 at 9:10pm

Math 115
A fence is to be built to enclose a rectangular area of 320 square feet. The fence along three sides is to be made of material that costs 6 dollars per foot, and the material for the fourth side costs 14 dollars per foot. Find the dimensions of the enclosure that is most ...
Thursday, March 26, 2015 at 9:09pm

Math 115
The revenue from selling q items is R(q)=475q−q2, and the total cost is C(q)=175+6q. Write a function that gives the total profit earned, and find the quantity which maximizes the profit.
Thursday, March 26, 2015 at 9:07pm

Math
Ricky needs 3 1/4 cups of sugar to make candy. He already has 2 1/2 cups. How many more cups of sugar does he need? Do you add for this question or subtract? That's all that I need to know.
Thursday, March 26, 2015 at 9:06pm

chemistry
What is the theoretical yield of H[2]O (in grams) if 8.3 mol H[2]S were consumed in the above reaction? If 137.1g of water was actually collected after the reaction, what is the percent yield? I have no idea to do this problem. I am not good in math at all and currently taking...
Thursday, March 26, 2015 at 9:03pm

math
The function f(x) = cx/2x+3 satisfies f(f(x))=x for all real numbers x\= -3/2. Find c.
Thursday, March 26, 2015 at 8:53pm

math
Suppose h(x)=1/\sqrt x for x>0. Does h have an inverse? If so, find h^-1(4).
Thursday, March 26, 2015 at 8:48pm

math
[2/3 -1/3] times 5/8
Thursday, March 26, 2015 at 8:34pm

Math
Convert 22 miles to yards. Use a proportion to solve. Show your work. Where do I start with this problem?
Thursday, March 26, 2015 at 8:18pm

math
A box contained some red, blue, and green markers. For every 5 red markers, there were 2 blue markers. For every 3 blue markers, there were 5 green markers. a. Find the ratio of red markers to blue markers to green markers. b. When 6 red markers were removed from the box,3/7 ...
Thursday, March 26, 2015 at 8:12pm

math
Don't laugh at me lol...it says Jamal is 5 feet tall. One sunny morning he notices that he casts a shadow that is 2 feet long. If the school building casts a shadow that is 7 feet long at the same time, what is the height of the building?
Thursday, March 26, 2015 at 8:06pm

Math
A set of trading cards sells for $12.00. After sales tax, it costs$12.60. what is the sales tax rate? Do I divide to get this answer? Please help.
Thursday, March 26, 2015 at 8:01pm

Choose all statements that are not true. a 20% of 20 is 4 b 30% of 30 is 9 c 40% of 50 is 15 d 50% of 110 is 60 e 60% of 60 is 360 The answer I choose is all of them. Is this correct.
Thursday, March 26, 2015 at 7:55pm

Math
Choose all statements that are true? a 15% of 15 is 1 b 5% of 50 is 10 c 10% of 100 is 10 d 2% of 100 is 5 e 3 % of 200 is 6 I picked a, c and e.
Thursday, March 26, 2015 at 7:45pm

Math
Choose all measurements that are equivalent to 45 meters. a 450 centimeters b 4500 centimeters c 0.045 kilometer d 0.45 kilometer e 4500 millimeters I pick b, d, e is this correct.
Thursday, March 26, 2015 at 7:39pm

Math
A printing company makes plastic banners 15 feet long by 6 feet wide. An overseas customer wants to know about how many square meters the banner is. Use 1 foot = 0.305 meter. a 8.37 square meters b 27.5 square meter c 90.0 square meter d 900 square meter Is c the correct answer?
Thursday, March 26, 2015 at 7:35pm

Math
Which is the best buy? a $19.25 for 11 candy bars b$15.39 for 9 candy bars c $17.30 for 10 candy bars d$22.62 for 13 candy bars I chose b.
Thursday, March 26, 2015 at 7:27pm

Math
What ratio is equivalent to 3/20? a 5 to 100 b 100 to 5 c 140 to 21 d 21 to 140 I picked d is this correct?
Thursday, March 26, 2015 at 7:22pm

Find the value of 'n' to make each statement true. 1. 22 times n is between 80 and 85
Thursday, March 26, 2015 at 7:16pm

math
if a 3-foot -tall child casts a shadow that is 2 feet long, how tall is a telephone pole that casts a shadow that is 40 feet long?
Thursday, March 26, 2015 at 7:14pm

Math
Manyatta Village is 74 km North West of Nyangata Village. Chamwe village is 42 km west of Nyangata. find the bearing of Chamwe from Manyatta
Thursday, March 26, 2015 at 7:08pm

Find the value of 'n' to make each statment true. 1.22 x n is between 80 and 85
Thursday, March 26, 2015 at 6:59pm

Can you check these, please? Ten cards numbered 1 through 10 are mixed together and then one card is drawn. Find the probability of each event. Write each answer as a fraction, percent, and decimal. 14. P(less than 5) = 4/10 = 2/5 Ans: 2/5, 40%, 0.4 15. P(greater than 3) = 7/...
Thursday, March 26, 2015 at 6:42pm

math
A model rocket is shot straight up into the air. The table shows its height, h(t), at time t. Graph the table below and determine a function, in standard form, that estimates the height of the rocket at any given time. Time(s) Height (m) 0 0.0 1 25.1 2 40.4 3 45.9 4 41.6 5 27....
Thursday, March 26, 2015 at 6:12pm

math
1 3 − x 4 = 7 12 find x
Thursday, March 26, 2015 at 6:01pm

Math
Shonetta Woods has a limited payment insurance policy with an annual premium of $1,125.00 until age 65. She pays the premium quarterly at an increased rate of 26.2 percent per quarter. How much money can Shonetta save in one year by paying the premium annually? Is it$54.00?
Thursday, March 26, 2015 at 5:54pm

Math
Fidel Baez has a health insurance plan with a $150.00 deductible. The plan covers 80 percent of his hospital charges. Fidel's recent health care costs include$300.00 in co-payments and a hospital bill of $2,300.00. What amount did he pay? Is it$910.00?
Thursday, March 26, 2015 at 5:53pm

Math
amy said there are three cubic feet in a cubic yard explain why amy is incorrect
Thursday, March 26, 2015 at 5:51pm

math
For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i dont know how to find for each of the points
Thursday, March 26, 2015 at 5:23pm

math
Thursday, March 26, 2015 at 5:03pm

Math Check
1.) Find 1/2([5 -2 4 0]+[14 6 -18 9]) A. [19/2 2 -7 9/2] B. [-9/2 -4 -11 9/2] C. [ 19/2 2 -7 9] D. [19 4 -14 9] My answer: C. 2.) Is it possible to find AB when you are give A= [3 2 1] and B= [2 3 0]? (this 2, 3, 0 is suppose to line up like up and down.) A. [12] B. [6 6 0] C...
Thursday, March 26, 2015 at 5:01pm

Math
How do you figure out the dimensions of a flower pot that has 300 cubic inches of soil?
Thursday, March 26, 2015 at 4:52pm

math
A swimming pool is 50 meters long. Jamie swam 60 lengths of the pool in one week. How many kilometers did she swim?I'm not sure how to do this. 50 x 60 = 3,000
Thursday, March 26, 2015 at 4:50pm

Math
Suppose she cut the cake into 8 equal size pieces and 6 people ate all the pieces. Explain how they could have divided the pieces so that everyone ate the same amount of cake. Show work in a drawing
Thursday, March 26, 2015 at 4:50pm

math
Complete the standard form of the equation –3y = 8 – 4x
Thursday, March 26, 2015 at 4:31pm

Math
For what values of k does the line y= x + k pass through the circle defined by x^2 + y^2 = 25 at: 2 points? 1 point? 0 points? I found the discriminant: 100- 4k^2 but i dont know how to find for each of the points
Thursday, March 26, 2015 at 4:30pm

math
What is it callec when you use a compass to find the midpoint of a line segment?
Thursday, March 26, 2015 at 4:28pm

math
Im doing a crossword and it says flip figure (mirror image) what is this?
Thursday, March 26, 2015 at 4:25pm

math
There are 20 bikes in spinning class, the bikes are arranged 4 rows, with 5 bikes in each row. They hope to be in the same row, but cannot request specific bike. Determine the probability that all 5 friends will be in same row with Jeff and dariya at either end.
Thursday, March 26, 2015 at 4:05pm

math
This year, Rosa harvested 60 cucumbers, 25 tomatoes, and 15 peppers from her garden. In a circle graph of this data, what angle measure (in degrees) should Rosa use for the peppers section?
Thursday, March 26, 2015 at 3:57pm

^math^
^Pls help^ Question= Evaluate sqrt(19 - 4sqrt21) ...,where sqrt is square root.
Thursday, March 26, 2015 at 3:32pm

math
Find the missing angle measurement
Thursday, March 26, 2015 at 3:07pm

math
What is the least common denominator for the fractions and ? A. 14 B. 18 C. 24 D. 48
Thursday, March 26, 2015 at 2:18pm

Math
Wong ran for 45 minutes in a marathon without stopping.How many seconds Wong run without stopping?
Thursday, March 26, 2015 at 2:06pm

MATH
Sam invested part of his 36,000 bonus in a fund that paid an 8% profit and invested the rest in stock that suffered a 5% loss find the amount of each investment if his overall net profit was 2,750
Thursday, March 26, 2015 at 1:44pm

Math
The sum of any two consecutive integers is a composite number. A. 16 + 17 = 33 B. 10 + 11 = 21 C. 6 + 7 = 13 D. 7 + 8 = 15
Thursday, March 26, 2015 at 1:36pm

math
Why wasn't cross multiplication used. Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks 5/3.5= x/1.16
Thursday, March 26, 2015 at 1:17pm

math
what is the volume of a cylinder with a radius of inches and a height of 6 inches ?
Thursday, March 26, 2015 at 1:16pm

Math
A box of Cereal X contains 36 ounces and costs $4.99. A box of Cereal Z contains 30 ounces and costs$ 4.50. Which cereal is the better buy ?
Thursday, March 26, 2015 at 1:04pm

math
Is there some other way I can explain this to my 8th grader. Five editors finish a project in 3 1/2 weeks. How many editors are needed to complete the same project in 1 1/6 weeks
Thursday, March 26, 2015 at 1:03pm

math
What is the missing exponent? (106) = 10 -18
Thursday, March 26, 2015 at 1:02pm

math
A rectangle has an area of 400 cm^2. If the rectangle is a square, what is its perimeter?
Thursday, March 26, 2015 at 12:52pm

Math
A 40-foot by 10-foot rectangular garden is enclosed by a fence. To make the garden larger, while using the same amount of fencing, its shape is changed to a square. How many square feet larger than the old garden is the new garden?
Thursday, March 26, 2015 at 12:41pm

Math
An experiment consists of rolling two fair number cubes. What is the probability that the sum of the two numbers will be 4?
Thursday, March 26, 2015 at 12:39pm

math
The area of a triangle is 600 square feet. Find the altitude, in feet, of the triangle if the length of the corresponding base is 30 feet.
Thursday, March 26, 2015 at 12:22pm

math
An equilateral triangle and a square both have perimeters of 48 inches. What is the ratio of the length of the side of the triangle to the length of the side of the square? Express your answer as a common fraction.
Thursday, March 26, 2015 at 12:02pm

Math
how do i solve: 200 = 1.862t^2 - 50t - 2
Thursday, March 26, 2015 at 11:28am

math
A brick making company manufactures bricks with the same height and width. the volume of each brick is 108 cubic inches and the base area of each brick is 36 square inches. If the length of a brick is denoted as x and the height and width of the brick is denoted by y, find the...
Thursday, March 26, 2015 at 11:28am

Math
Hi! I need help with these two questions. Thanks! :) 1.) Can we multiply the Matrix A (which is 3 x 4 matrix) by the other matrix, Matrix B (which is 3 x 4 matrix)? True Or False? 2.) When we multiply the 6 x 3 matrix by the 3 x 1 matrix, the final matrix would be in what ...
Thursday, March 26, 2015 at 11:01am

Math
Suppose you have a cache of radium, which has a half-life of approximately 1590 years. How long would you have to wait for 1/5 of it to disappear?
Thursday, March 26, 2015 at 10:30am

math
n/4=17/3
Thursday, March 26, 2015 at 10:25am

Math question
Of 100 students surveyed, 33 like orange soda, 55 like cola, and 14 like both. How many students do NOT like orange soda? My answer=67. Am I correct?
Thursday, March 26, 2015 at 10:13am

math
At a local high school,560 out of 1060 students voted to support a community fund drive. What percent of the students did not support the fund drive?
Thursday, March 26, 2015 at 9:21am

Math
Find the co-ordinates where f(x)intersects f'(x). f(x)= ln(x+3) f'(x)= -3+e^x I rewrote f(x) so that it looks like: e^y=x+3 then I inserted f'(x): y=-3+e^x into f(x) and after a bit of working I got x=-10.6 which is not possible because ln of something negative is ...
Thursday, March 26, 2015 at 8:36am

Math
Samantha has 2 meters of ribbon for wrapping packages She uses 15 centimeters of ribbon on first package how much ribbon is left
Thursday, March 26, 2015 at 12:26am

Math if my answer is correct
The function h(t) = 2 + 50t - 1.862t^2, where h(t) is the height in metres and t is the time in seconds, models the height of a golf ball above the planet Mercury's surface during its flight. A) How long will the ball be above the surface of Mercury? I get t= 22.02 and 4....
Wednesday, March 25, 2015 at 11:24pm

Math
Phil bought a block of cheese in the shape of a rectangular prism measuring 8 inches by 4 inches by 2 inches. He cut four pieces of cheese off the block each measuring 2 inches by 3 inches by inch . how much of the block of cheese is left . IS the answer 40in3
Wednesday, March 25, 2015 at 11:01pm

Can you check these? 1. Jonelle is running on a track that is 2/3 of a mile long. So far she has run 4/5 of the way around the whole trace. How far has she run so far? Ans: (2/3)(4/5) =8/15 mile 2. A recipe for muffins needs 3/4 of a cup of milk. You are making 1/2 of the ...
Wednesday, March 25, 2015 at 9:53pm

math
sam cut a pie into equal slices. there are only 3 slices left. the angle measure for the three slices is 72 degrees. how many slices did sam cut the pie into?
Wednesday, March 25, 2015 at 9:48pm

math.
Kool Klothes has determined that the revenue function for selling x thousand pairs of shorts is R(x) = -5x^2 + 21x. The cost functiom C(x) = 2x + 10 is the cost of producing the shorts. A) How many pairs of shorts must the company sell in order to break even. Do i use the ...
Wednesday, March 25, 2015 at 9:44pm

math
Alyssa IS 4 TIMES OLDER THEN JIFFIS 2 TIMES OLDER THAN SARAH AND SARAH IS 8 PLZ HELP
Wednesday, March 25, 2015 at 9:27pm

Math
How do you find the area if a composite shape?
Wednesday, March 25, 2015 at 9:20pm

Is my answer correct?? The function h(t) = 2 + 50t - 1.862t^2, where h(t) is the height in metres and t is the time in seconds, models the height of a golf ball above the planet Mercury's surface during its flight. A) What is the maximum height reached by the ball? I got ...
Wednesday, March 25, 2015 at 9:15pm

math
there are half as many 11th grade students in the band the are 9th grade students. how many 11th grade students are in the band
Wednesday, March 25, 2015 at 9:13pm

math
A diver on a platform 40 feet in height jumps upward with an initial velocity of 5ft/s. His height in h feet after t seconds is given by the function h=-16t^2+5t+50. a. What is his maximum height? I got 50.39 b. How long will it take him to reach the surface of the water? h=-...
Wednesday, March 25, 2015 at 9:11pm

math
A number cube with the numbers 1 through 6 is rolled. find the given probability P(number < 2) (1 point) 1/6 2/6 *** 4/6 3/6 2. P(number ≥ 3) (1 point) 4/6 1/6 2/6 5/6 I think it's A .. I'm not quiet sure. please help 3. P(complement of 4) (1 point) 1/6 5/6 2/...
Wednesday, March 25, 2015 at 9:02pm

Math
Write an expression for the following: The quotient if a number and 20
Wednesday, March 25, 2015 at 9:02pm

math
Landyn wants to mix concentrate and water together to make her juice. The juice is 15% concentrate and 85% water. Her pitcher can hold 12 cups of juice. How many cups of concentrate does she need?
Wednesday, March 25, 2015 at 8:56pm

Math
Write a Mathematical expression equivalent to 3 (9+12)
Wednesday, March 25, 2015 at 8:56pm

Math
Last year 5300 people attended a football game. This year the figure is expected to increase by 17%. About how many people are expected to attend the game this year?
Wednesday, March 25, 2015 at 8:37pm

math
while training for a marathon Anderson is supposed to run a total of 10 miles total during the week. he ran the following number of miles from Monday to Saturday: 4 1/2, 1 2/3, 4/6, 3 1/12, 1/6 how far did Anderson run during the week?
Wednesday, March 25, 2015 at 8:03pm

Math
what are 2 parallelograms that each have an area of 24 units and a height of 4 units besides 6 unitstimes 4 units
Wednesday, March 25, 2015 at 7:48pm

math
Keo's model airplane uses 0.03L of fuel each minute it flies. If the fuel tank holds 0.5L,how long can the plane fly without refueling?
Wednesday, March 25, 2015 at 7:47pm

Math
How do you explaint to a 2nd grader how to find 2/3 minus 1/4?
Wednesday, March 25, 2015 at 7:33pm

math
A $300 mountain bike is discounted by 30% and then discounted an additional 10% for shoppers who arrive before 5am. If you go to the store at 4:30 am, how much will you pay? I did 300^30 =90. 300 -90 ==210 ^ 10 =2.10. 210-2.10= 207.90. Is this correct? Wednesday, March 25, 2015 at 7:11pm math If x unit of a product cost C dollars to manufacture and earn revenue of R dollars, the value of X where the expression for C and R are equal is called break-even quantity, the number of units that produce zero profit. Find the break-even quantity when c=14X+48000 and R=18X Wednesday, March 25, 2015 at 7:02pm Math Kami has an average of 64% in her class. School ends soon and she would like to raise her grade to a 74%.She has 2 tests left and tests counts as 80% of her grade, what would she have to get on the next to test to get her average up to a 74%? Wednesday, March 25, 2015 at 7:00pm math A baseball team has home games on Friday and Sunday. the two games together earn$3391.00 for the team. Fridays game generates \$401.00 less than Sundays game. How much money was taken in each game?
Wednesday, March 25, 2015 at 6:57pm

math
suppose that x liters of 36% acid solution are mixed with y liters of a 50% solution to obtain 100 L of a 37% solution. One equation is a system for solving this problem is x+y=100. which of the following is the other solution?
Wednesday, March 25, 2015 at 6:49pm

Math
One half of the birds at the pet store was yellow. Tara buys one of the yellow birds. The one third of the birds at the store are yellow. How many yellow birds were at the store before Tara brought one ?
Wednesday, March 25, 2015 at 6:38pm

math
The equation below shows how Mandy decides how much juice to buy for a party. In the equation, g is the number of gallons of juice she buys, and t is the length of the party in hours. g= 3t + 5
Wednesday, March 25, 2015 at 6:21pm

math urgent
let V=R^3 and S={u1,u2,u3}=[1;2;0],[1;0;0],[1;0;1] These are three vectors 1 by 3 use gschmidt to obtain an orthogonal basis and then find the coordinates of x=[1;2;3] relative to this basis.
Wednesday, March 25, 2015 at 6:00pm

math
One night Ms. Factor baked chocolate chip cookies. She used a 20-ounce package of cookie dough to make 3 dozen cookies. What was the average weight of each cookie.
Wednesday, March 25, 2015 at 5:37pm

Math
Use the initial condition y(0)=4 and step size h=.25, calculate the backward Euler on [0,1] for the ODE y'=10y-10y^2. Solve the ODE exactly and compute the errors at t=1.
Wednesday, March 25, 2015 at 5:36pm

math
Ty needs to cut strips of wrapping paper that are each 9 inches wide.If Ty has 2 rolls of wrapping paper that are 15 feet long, how many 9-inch strips can he cut ?
Wednesday, March 25, 2015 at 5:22pm

math
Use compatible numbers to estimate the quotient. 256.1 divide by 82. My answer is 240 divide by 40 = 3.
Wednesday, March 25, 2015 at 5:17pm

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