Saturday
May 30, 2015

Homework Help: Math

Branches of Math

Recent Math Questions

Math
A parallelogram has adjacent sides of 78 inches and 90 inches, and the angles between them is 35 degrees. Find the length of each of the diagonals.
Saturday, May 30, 2015 at 10:52am

math
An engineer sees that the angle of elevation to a vertical tower is 45 degrees. When he moves 40 feet closer to the tower on the same straight, level path, he sees that the angle of elevation becomes 55 degrees. How tall is the tower?
Saturday, May 30, 2015 at 10:29am

math
An Artisan has 63 kg of metal of density 7,000kg/m3. He intends to use make a rectangular pipe with external dimensions 12 cm by 15 cm and internal dimensions 10 cm by 12 cm. Calculate the length of the pipe in meters.
Saturday, May 30, 2015 at 7:42am

math
if x = 1-squareroot of 2, find the value of (x-1/x)power of 3
Saturday, May 30, 2015 at 7:40am

math
simplify 1/(1+square root of 2) + 1/( square root of 2 + square root of 3) + 1/(square root of 3 + square root of 4)
Saturday, May 30, 2015 at 7:38am

math
if x = 1-square root of 2, find the value of (x - 1/x) power of 2
Saturday, May 30, 2015 at 7:35am

math
if x= 3+2^2, find the value of (^x - 1/x)^2
Saturday, May 30, 2015 at 5:36am

math
What is the solution to the inequality |2n+5|>1? A. –3 > n > –2 B. 2 < n < 3 C. n < –3 or n > –2 D. n < 2 or n > 3 I put A! :) Thank you again.
Friday, May 29, 2015 at 11:44pm

math
Which inequality is equivalent to |x-4|<9? A. –9 > x – 4 < 9 B. –9 < x – 4 < 9 C. x – 4 < –9 or x – 4 < 9 D. x – 4 > –9 or x – 4 < 9 I put B?
Friday, May 29, 2015 at 11:14pm

MAth
What should you say when you meet an angel
Friday, May 29, 2015 at 9:46pm

Math
you drive 12,000 miles per year and use 343 gallons of unleaded gasoline. What is your monthly cost of gasoline? my answer: $478.49
Friday, May 29, 2015 at 7:40pm

Math
Joan bought a sweater at a 1/4 off sale. The regular price of the sweater was $37.50. How much did joana pay for the sweater? My Answer: $28.14 is what she had paid for the sweater.
Friday, May 29, 2015 at 6:20pm

MATH
Karl bought a tennis racket at a 1/3 off sale. the regular price of the racket was $45.75. how much did karl pay for the racket? My answer: $30.65 is what Karl paid for the racket, am i right?
Friday, May 29, 2015 at 6:18pm

Math
A thermos holds 1 1/4 quarts of water. How many thermoses can be filled with 5 quarts of water? My Answer: 6 1/4 am i right? i just multiplied 1 1/4 and 5 to get 6 1/4.
Friday, May 29, 2015 at 6:06pm

Math
An airplane takes 5 3/4 hours to reach its destination and 4 1/2 hours to return. If the plane was on the ground for 1 1/4 hours, what was the total time the plane was gone? My answer is 11 1/2 hours, i just added all three numbers am I right?, or was I just supposed to add ...
Friday, May 29, 2015 at 5:49pm

Math
(2y-3)(3y-2) A. 6y2-13y+6 B. 6y2-13y-6 C. 6y2+13y-6 * D. 6y2+13y+6 *my answer (btw the 2 next to 6y is an exponent) I think that it is C, but I want to be sure that it is correct.
Friday, May 29, 2015 at 4:48pm

math
Samuel is 1/2 as old as his brother. In seven years, he will be 2/3 as old as his brother will be. Find their present ages. Show each step of your work.
Friday, May 29, 2015 at 4:27pm

Math
1. Write the coordinates of point K. A. (6,-1) B. (-1,6) C. (-6, 1) D. (1,-6)
Friday, May 29, 2015 at 4:07pm

Math/ASU
A movie theater sold a total of 520 adult and child tickets on a certain day. The theater sold 2.25 times as many adult tickets as child tickets. Each adult ticket cost $9 and each child ticket cost $2. How much revenue did the theater generate in ticket sales that day?
Friday, May 29, 2015 at 12:26pm

Algebra/Math
Write an inequality to represent the situation: The temperature stayed above -15*. I've already done this test, but I'm doing corrections. Please help? I'm thinking that the -15* is <=.
Friday, May 29, 2015 at 9:48am

math
Sarah has a piece of rope that is 10 ft long. She wants to cut it into 2 pieces so that the longer piece is 2 ft less than 3 times the shorter piece. How many ft long will the shorter piece be?
Friday, May 29, 2015 at 9:28am

math
find the equation of a circle whose diameter has ends points A=(-4, 3)and B=(5, 7)and it subtends a 90 degree at the circumference.
Friday, May 29, 2015 at 3:01am

math
Bruce scored a 12, 18, 16, and 17 on his four quizzes. What must his score on the fifth quiz be if he wants an overall average of 16.
Thursday, May 28, 2015 at 11:19pm

Algebra
Explain how to use mental math to simplify the expression. a.) 8 * 3 * 2 b.) 8 * 2 + 3 c.) 5 + 8 + 3 d.) 10 * 3 -4 I have to explain the process. Example: Using the associative property of multiplication I can group 8*(3*2) so I get 8*6. Then I multiply 8*6 which is 48.
Thursday, May 28, 2015 at 10:48pm

math
Consider the distribution of mathematics SAT scores of students in honors calculus at a liberal arts college. What would you expect the shape and variation of the distribution to be? A. Symmetric with little variation B. Symmetric with large variation C. Skewed right with ...
Thursday, May 28, 2015 at 10:03pm

Math
A bag contains tiles with the letters -C-O-M-B-I-N-A-T-I-O-N-S. Lee chooses a tile without looking and doesn't replace it. He chooses a second tile without looking. What is the probability that he will choose the letter O both times? A) 1/132 B) 1/72 C) 1/66 D) 1/23 Is the...
Thursday, May 28, 2015 at 9:53pm

math
A bird is flying southward at a rate of 480 mph. There is an east wind blowing at 60 mph. What is the new speed and direction of flight of the bird?
Thursday, May 28, 2015 at 9:50pm

Math
For each quadratic function, find the axis of symmetry of its graph. y=3x^2-6x+4
Thursday, May 28, 2015 at 9:33pm

Math
I have a practice math test and I am stuck on a few. Please help :-) 1) Write the number of permutations in factored form. Then simplify. How many different ways can you and four of your friends sit in the back of a limousine? A) 4!; 24 B) 4!; 120 C) 5!; 120 D) 5!; 720 2) ...
Thursday, May 28, 2015 at 8:51pm

Algebra
Explain how to use mental math to simplify the expression. a.) 8 * 3 * 2 b.) 8 * 2 + 3 c.) 5 + 8 + 3 d.) 10 * 3 -4 I have to include what properties (associative, distributive etc.) I used to simplify the problems.
Thursday, May 28, 2015 at 8:34pm

Math
If each box costs the same amount to ship, which would be more cost effective? Hint: Which has a greater volume? They are rectanglur prisims Box 1: 4ft 3ft 2ft Box 2: 2.5 ft 5ft 2ft
Thursday, May 28, 2015 at 8:05pm

Math
Q. Coles sleeping bag has four sides. The side with the zipper is parallel to the opposite side. None of the angles where the sides meet are right angles. The side opposite the zipper is shorter than the side with the zipper. The other two sides are the same length. What shape...
Thursday, May 28, 2015 at 8:04pm

Math
Q. Tim and Jorge hope they will be assigned to the same cabin at the summer camp. Each cabin has 8 beds in it. And Tim knows that he is saying in the green cabin not the red cabin. If there are 14 boys going to camp in addition to Tim and Jorge. What is the change that Tim and...
Thursday, May 28, 2015 at 7:23pm

math
3x2+5x-5x2-4x+5-2
Thursday, May 28, 2015 at 7:16pm

Math
Hi I'm trying to do my graph and the numbers go from 50 100 150 200 250 300 there is a point missing between 200 and 250. How do I find the number between 200 and 250?
Thursday, May 28, 2015 at 7:02pm

Math
Q. Tim and Jorge hope they will be assigned to the same cabin at the summer camp. Each cabin has 8 beds in it. And Tim knows that he is saying in the green cabin not the red cabin. If there are 14 boys going to camp in addition to Tim and Jorge. What is the change that Tim and...
Thursday, May 28, 2015 at 6:57pm

Math
tracy invested $6000 for one year, part at 10% annual and the balance at 13% annual interest. her total interest for the year was $712.5. how much money did she invested at each rate? I tried using a table for this I just don't know how to set the problem up.
Thursday, May 28, 2015 at 3:34pm

MATH
0.4771=x/2.303*8.14[50/323*373 calc.-x?
Thursday, May 28, 2015 at 1:23pm

Math
The area of a rectangle is 42m2.If its length is 5m, what is its breadth?
Thursday, May 28, 2015 at 1:22pm

Math
The area of a rectangle is 900m2.If its breadth is 45m,what is its length?
Thursday, May 28, 2015 at 1:13pm

algebra..Matrix...math
Hi, Please help me to this question would prove less than 10 hours Athens has a population of n ,m club with any club membership is an even number and the number of members of both clubs to prove and show m<n
Thursday, May 28, 2015 at 10:54am

math
A truck has a cylindrical tank 9 m long for transporting milk. The diameter of the tank is 2.8 m. How much milk can it hold? (Use 3.14 for π.)
Thursday, May 28, 2015 at 9:23am

Math
The parking lot has 5/6 as many vans as trucks. What equation can be use to show the number of vans?
Thursday, May 28, 2015 at 6:53am

Math
Ralph has a bag of 28 marbles. Each marble weighs 3.099 grams. About how many grams does the bag weigh?
Wednesday, May 27, 2015 at 9:40pm

math
A first-class letter can weigh up to 13 ounces before additional charges must be added. Estimate how much more weight can be added to a letter that weighs 10 1/3 ounces.
Wednesday, May 27, 2015 at 9:22pm

5th grade math
51 is 4 times the number of books, less 13
Wednesday, May 27, 2015 at 8:43pm

5th grade math
51 is 4 times of book is less 13
Wednesday, May 27, 2015 at 8:31pm

Math
An airplane is heading north at an airspeed of 300km/ hr, but there is a wind blowing from the northwest at 50km/hr. How many degrees off course will the plane end up flying, and what is the plane's speed relative to the ground?
Wednesday, May 27, 2015 at 8:27pm

Math
10-2/3p=42 I think the answer is p=63
Wednesday, May 27, 2015 at 8:23pm

5th grade math
The sum of 6 and the product of 7 and a number is 75
Wednesday, May 27, 2015 at 7:42pm

Math I need help ASAP!
1. which of the following is true of a random sample? a. it is the only way to sample a population. b. each member of the sample is a volunteer. c. it is always the easiest way to sample a population. d. each member of the population has an equal chance of being selected. 2. ...
Wednesday, May 27, 2015 at 6:20pm

1st grade math
Draw a quick picture for 26+8. Show how to make a ten to model the number of apples a different way. Write a new number sentence I did 26 + 8 apples .. I drew 8 apples = 34 then I put 7+ 3 = 10 ?
Wednesday, May 27, 2015 at 5:48pm

1 st grade math
draw a new quick picture for pablo's apples. show how to make a ten to model the number of apples a different way. write a new number sentence. 4 + 6 = 10 ?
Wednesday, May 27, 2015 at 5:41pm

math
Half of Sarah's wire is equal to 2/5 of Daniels. Chris has 3 times as much as Sarah. In all, their wire measures 6 ft. How long is Sarah's wire in feet?
Wednesday, May 27, 2015 at 5:10pm

Math
trigonometric identities tan^2Ө/sin^2Ө-1=tan^2Ө​
Wednesday, May 27, 2015 at 4:59pm

Math
The volume of a cone that fits exactly inside a cylinder is 20 cubic feet. What is the volume of the cylinder? (5 points) Select one: a. 4 cubic feet b. 5 cubic feet c. 40 cubic feet d. 60 cubic feet IDK WHAT TO DO!!!
Wednesday, May 27, 2015 at 3:08pm

Math
Write an equation for the parabola with focus (0, 0) and directrix y = 1. I got -x^2 - 2y + 1, but how do I get it in the form y - k = 1/4p(x - h)^2?
Wednesday, May 27, 2015 at 2:39pm

math
When a pendulum swings 35degree from the vertically, the weight moves 15cm horizontally and 5.3 vertically. The length of the pendulum?
Wednesday, May 27, 2015 at 2:26pm

math
Product A This product will take 2 years to develop, at a cost of $100,000 in the first year (Yr 0) and $50,000 in the second. Revenue (benefits) in subsequent years is expected to be $100,000 per year. Product B This product will only take a year (Yr 0) to develop, at a cost ...
Wednesday, May 27, 2015 at 1:53pm

Math
Class of 20 students, 13 play soccer, 8 play tennis and 2 play neither. Find how many students a) Play soccer or tennis b) Play both soccer and tennis c) Play only soccer
Wednesday, May 27, 2015 at 1:30pm

Math
Write an equation in standard form for each parabola. Vertex (0, 0) and directrix y = 6. y = -1/24x^2?
Wednesday, May 27, 2015 at 12:54pm

math
Alexander found the means-to-MAD ratio of two data sets to be 3.4. What can he conclude about the distributions? A. They are similar. B. They are somewhat similar. C. They are different. D. They are identical
Wednesday, May 27, 2015 at 11:21am

Math
Jaime mixes purple paint. She uses six pints of blue paint for every five pints of red paint. Jaime wants to mix more paint exactly the same color. She has 21 pints of blue paint. How much red paint does she need?
Wednesday, May 27, 2015 at 10:52am

Math
A dealer bought 5 quintals of rice for Rs.19 per kg paid Rs.500 on transportation.if he had sold the rice at the rate of Rs.20.50 per kg,find his profit?
Wednesday, May 27, 2015 at 8:03am

English
Talk with your partner about what you don't have to do during the vacation. What don't you have to do on vacation? 1. I don't have to go to school. 2. I don't have to take the bus. 3. I don't have to take bus number 5 to go to school. 4. I don't have to...
Wednesday, May 27, 2015 at 7:46am

dentistry question
is it possible to become a dental surgeon with just average grades, and no math in senior year?
Wednesday, May 27, 2015 at 6:54am

college major
can you major in operations research and be ok in math. (not great)?
Wednesday, May 27, 2015 at 6:29am

college major
can you major in operations research and be ok in math. (not great)?
Wednesday, May 27, 2015 at 6:29am

Math
What is the best way to use mental math to multiply (5x18)x20?
Wednesday, May 27, 2015 at 6:10am

Math
I need help with one of the algebra with pizzazz worksheets. Its DD-39 AKA "Why did the banana go out with the prune?" I got the answers but not the work. Please help.
Wednesday, May 27, 2015 at 5:49am

Math
The graphs of 5x-3y=35, 7x-3y=43, and 4x-ay=61 all intersect at the same point. Find the value of "a". Do I solve the systems and then plug in? I am not sure haha.
Wednesday, May 27, 2015 at 1:41am

Math
Jesse and Leah can install a new gutter system on a house in 4 hours when they work together. Working alone, it would take Leah twice as long to install a new gutter system as it would take Jesse working by himself. Leah caught a really bad cold and called in sick this morning...
Tuesday, May 26, 2015 at 11:55pm

Math
Mr. Lee invested some money. Lost 4% in a stock and gained 3.2% in a bond. Overall he lost 11.2$. If he invested the amount in the stock to the bond vice versa, then he wouldve gained $3.2, how much is in the bond and how much is in the stock? I got: 0.96x+1.032y=x+y-11.2 0....
Tuesday, May 26, 2015 at 11:16pm

math
There are 120 tickets being sold for a raffle contest. There is one winning ticket. Lana buys 10 tickets. What are the probability she will win the prize
Tuesday, May 26, 2015 at 11:10pm

Math
Mr. Lee took the $1200 he collected fr chinese new yea and invested some in a 6% bond, and the rest at a 4.5% T-bill. The return for the T-bill exceeded thay from the bond by $12. How much was invested at each rate?
Tuesday, May 26, 2015 at 10:52pm

Math help
Mr. Lee took the $1200 he collected fr chinese new yea and invested some in a 6% bond, and the rest at a 4.5% T-bill. The return for the T-bill exceeded thay from the bond by $12. How much was invested at each rate? Thanks!
Tuesday, May 26, 2015 at 10:37pm

Math
(6*10^7)*(3*10^-8)^2/8.2*10^-20.simplify​ in scientific notation.
Tuesday, May 26, 2015 at 10:17pm

Math
Mr. Lee invested some money. Lost 4% in a stock and gained 3.2% in a bond. Overall he lost 11.2$. If he invested the amount in the stock to the bond vice versa, then he wouldve gained $3.2, how much is in the bond and how much is in the stock? I am so confused, and out of ...
Tuesday, May 26, 2015 at 9:59pm

Math
A spy plane, whose average speed in still air is 250 mph, departs with a 40 mph tailwind and returns to the same airport flying into the same wind. How far from the airport can the plane fly if it has enough fuel to fly for 5 hours?
Tuesday, May 26, 2015 at 8:51pm

Math Ms Sue ???
The image of an eraser in a magnifying glass is three times the eraser’s actual size and has a width of 14.4 cm. What is the actual width of the eraser in cm? a) 14.4 cm. b) 3 cm. c) 43.2 cm. d) 4.8 cm. is it C? A square has 16-cm sides. What is the perimeter of the image...
Tuesday, May 26, 2015 at 7:23pm

Math
The length of the hypotenuse of a 30-60-90 triangle is 9. What is the perimeter?
Tuesday, May 26, 2015 at 7:14pm

Math
What is the missing value to the nearest hundredth? tan__=12 A. 85.24 B. 87.61 C. .12 D. .98
Tuesday, May 26, 2015 at 7:04pm

math
How would i do a table of values for this equation: y=1/2(3)^-2x starting from -5 to 5 i get these values: -0.2778, -0.2222, -0.1667, -0.1111, -0.0556, 0 etc... am i wrong?
Tuesday, May 26, 2015 at 7:02pm

Math
The image of an eraser in a magnifying glass is three times the eraser’s actual size and has a width of 14.4 cm. What is the actual width of the eraser in cm? a) 14.4 cm. b) 3 cm. c) 43.2 cm. d) 4.8 cm. is it C? A square has 16-cm sides. What is the perimeter of the image...
Tuesday, May 26, 2015 at 6:59pm

math
Mike has a tree 58ft long and wants to cut it into 24 equal pieces. How long would the pieces be?
Tuesday, May 26, 2015 at 6:59pm

math
How would i do a table of values for this equation: y=1/2(3)^-2x starting from -5 to 5 i get these values: -0.2778, -0.2222, -0.1667, -0.1111, -0.0556, 0 etc... ami wrong?
Tuesday, May 26, 2015 at 6:32pm

Math- Geometry
Kristen lives directly east of the park. The football field is directly south of the park. The library sits on the line formed between Kristen’s home and the football field at the exact point where an altitude to the right triangle formed by her home, the park, and the ...
Tuesday, May 26, 2015 at 6:06pm

Math
Three friends are planning to visit each other. To optimize travel time, they want the meeting place to be equidistant from the three different cities they live in. The cities are located at A(-16, -1), B(1, 6), and C(1, -18). What are the coordinates where the meeting should ...
Tuesday, May 26, 2015 at 5:46pm

math
How would i do a table of values for this equation: y=1/2(3)^-2x starting from -5 to 5 i get these values: -0.2778, -0.2222, -0.1667, -0.1111, -0.0556, 0 etc... ami wrong?
Tuesday, May 26, 2015 at 5:29pm

Math
What is the surface area and volume of a composite figure made up of a hemisphere and a cone in terms of pi? The radius is 10, and the slant height is 15. Are my answers right? Cone surface area: π(10)(15) = 150π Hemisphere surface area: 2π(10)^2 = 200π 350...
Tuesday, May 26, 2015 at 5:21pm

Math
The width of a picnic table is 3 times its length. If the length is 5/6 yards Long, what is the area in square feet?
Tuesday, May 26, 2015 at 4:15pm

Math
1. Write a rule to describe the translation of a point from (-3,3) to (-2,2). a. (x,y) --> (x - 1, y + 1) b. (x,y) --> (x + 1, y + 1) c. (x,y) --> (x - 1, y - 1) d. (x,y) --> (x + 1, y - 1) 2. The coordinates of an ordered pair have opposite signs. In which ...
Tuesday, May 26, 2015 at 3:36pm

math algebra 1
The length of a rectangle is 2 m less than the diagonal and the width is 8 m less than the diagonal. If the area is 82 m2, how long is the diagonal?
Tuesday, May 26, 2015 at 3:31pm

math
interge[1/(t*t-1)(t*t-1)] I haven't got a way to solve it.. please help me..
Tuesday, May 26, 2015 at 1:55pm

Math Help
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 from 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
Tuesday, May 26, 2015 at 12:59pm

Math
The sixth term of an A.P. is 5 times the first term and the eleventh term exceeds twice the fifth term by 3 . Find the 8th term ?
Tuesday, May 26, 2015 at 12:43pm

math
A favorite sports poll of 30 teenagers shows that 18 like soccer, 9 like baseball and 10 like ice hockey. Three teenagers like all three sports, 3 like only soccer and baseball, 4 like only hockey and soccer, and 3 like only hockey. How many teenagers do not like any of these ...
Tuesday, May 26, 2015 at 12:31pm

Math
3400 divided by what makes 100
Tuesday, May 26, 2015 at 12:29pm

math
For a geology project, Chelsea collected 16.5 kg of rocks on the first expedition and 14.7 kg on the second expedition. Ari collected the same total kilograms of rocks as Chelsea did, but he collected only 13.9 kg on the first expedition. How much did Ari collect on the second...
Tuesday, May 26, 2015 at 10:55am

MATH
X^2-4X+4
Tuesday, May 26, 2015 at 6:54am

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