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December 20, 2014

Homework Help: Math

Branches of Math

Recent Math Questions

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math
The difference between two numbers is 7.
Tuesday, December 9, 2014 at 3:09pm

Math
Brady bought a gift that cost 15.99. After a sales tax of 5%, how much did he spend on his gift?
Tuesday, December 9, 2014 at 3:04pm

math
Jane had 16m of ribbon. She gave 3 2/7of it to Linda and 4 1/3 to Sarah. How much ribbon was left?
Tuesday, December 9, 2014 at 3:02pm

Math
Express the product, x^2 + 4x divided by 2x^2+13x+15 multiplied by x+5 divided by x^2 - 16 ? a)-1/2x+3 b)x/(2x-16)(x+4) c)(x^2+4x)(x+5) / (2x^2+13x+15)(x^2-16) d)x / (2x+3)(x-4)
Tuesday, December 9, 2014 at 12:34pm

Math
When fully simplified, ignoring non-permissible values, 12x^12/4x^3 divided by x^8/24x^6? a)72x^3 b)1/72x^7 c)1/72x^3 d)72x^7
Tuesday, December 9, 2014 at 12:25pm

Math
Jack says that once you have a common denominator you are ready to subtract two mixed numbers. What other step might be necessary before you can subtract? Give an example.
Tuesday, December 9, 2014 at 12:21pm

math
could you please show me the steps to do this problem? 8 2/7-7 1/3
Tuesday, December 9, 2014 at 10:23am

math
Calculate the markdown percent. Round to the nearest tenth and do not enter the percent symbol in your answer. % b. If the offer was changed to "Buy 3, Get 2 Free," what would be the new markdown percent? Round to the nearest tenth and do not enter the percent ...
Tuesday, December 9, 2014 at 10:00am

Math
A carton contains 1 8/9 liters of apple juice. Rosalia drinks 1/6 liter of the juice every day. How much apple juice is left in the carton after a week?
Tuesday, December 9, 2014 at 8:46am

math
the sum of the ages of sam and tomas is 27 years. seven years ago, tomas was three years more than one-fourth as old as sam. find their present age
Tuesday, December 9, 2014 at 7:36am

math
the perimeter of a rectangle is 56 m. the width of the rectangle is 4 m less than the length. find the length and width of the rectangle
Tuesday, December 9, 2014 at 4:51am

math
simplest form of the ratio of rs20 to 50ps
Tuesday, December 9, 2014 at 3:39am

math(5th grade)
Gino wants to travel from home to school. Find how many routes are possible if he does not travel in a northerly direction.
Tuesday, December 9, 2014 at 2:33am

Basic Statistics
The math grades on the final exam varied greatly. Using the scores below, how many scores were within one standard deviation of the mean? How many scores were within two standard deviations of the mean? 99 34 86 57 73 85 91 93 46 96 88 79 68 85 89
Tuesday, December 9, 2014 at 1:07am

Math
g(x) = (1-x)(4+6x) / (5x^2+4) Horizontal asymptote y = ?
Tuesday, December 9, 2014 at 12:14am

Math (Word Problem into formula)
A chemist is studying the properties of a bronze alloy (mixture) of copper and tin. She begins with 6 kg of an alloy that is one sixth tin. Keeping the amount of copper constant, she adds small amounts of tin to the alloy. Letting x be the total amount of tin added, define c(x...
Monday, December 8, 2014 at 11:53pm

Math
How many 3 digit numbers can you find whose digits have a sum of 4. 112 211 103 301 310 013 031 202 220 022 400
Monday, December 8, 2014 at 11:26pm

Math
f(x) = (9-8x) / (10x-9) f^-1(x) =
Monday, December 8, 2014 at 11:25pm

Math
A cook has 2 2/3 cups of flour. A recipe calls for 2 3/4 cups of flour. Does the cook have enough flour? If not, how much more flour is needed?
Monday, December 8, 2014 at 11:15pm

Math
Limit(7x+6x^2) / (7x^2+6x) x->inf
Monday, December 8, 2014 at 11:06pm

Math
What is log x + log x + log x = 3? I want to say 3000 since 10^3=1000, then three times makes 3000.
Monday, December 8, 2014 at 10:48pm

math
An experiment consists of drawing one ball from a box containing 5 white balls numbered 1 through 5 and black balls numbered 6 through 10. Find the probability that a randomly selected ball is black and numbered 7.
Monday, December 8, 2014 at 10:40pm

Math
On a map 1/4 inch represents 20 miles the distance between two cities on the map is 3 3/4 inches how many miles apart are in the two cities?
Monday, December 8, 2014 at 10:14pm

Math
the math problem is 8 3/5 divided by 1 2/3 =5 4/25 how do you answer with bar models
Monday, December 8, 2014 at 10:10pm

Math (Simplifying Fraction)
(x^-1+4x^-2)/(1-16x^-2)
Monday, December 8, 2014 at 9:59pm

math
Teacher divided the kids into groups of 3, each students did 9 photos a piece which equals 585 photos in all. How many Students were in each group
Monday, December 8, 2014 at 9:54pm

Math
(6/x^2+5x+6) + (9/x+3) express answer in reduced form What i attempted is to factor out the bottom half of the first fraction to 6/(x+2)(x+3) the second half i'm guessing would be to multiply each side by the x+3? making it a (6x+18/(x+2)(x+3)) + 9 or would i write it as 6...
Monday, December 8, 2014 at 9:53pm

math
It is a 4-digit number The tens are double the ones. The thousands are double the tens. The sum of the digits is 19. What number is it?
Monday, December 8, 2014 at 9:40pm

math
The rental fee for a van is $40 per day plus .08 per mile. Jan has $150. How far can she drive and stay in her budget
Monday, December 8, 2014 at 9:39pm

Math
Simplify (x-(1/x))/(1-(1/x)) I don't get how to do this, can someone please help me? :)
Monday, December 8, 2014 at 9:32pm

math
find the value of x: 25=(748/7)p0werX
Monday, December 8, 2014 at 9:15pm

Math
What is 995.8755 rounded to the nearest whole dollar
Monday, December 8, 2014 at 9:14pm

Math.
Can you guys help me? -18/81 in lowest term? 5/12 in lowest term? 16/24 in lowst term? 25/55x .. simplify ?
Monday, December 8, 2014 at 9:06pm

math
What is the maturity value of a loan for $39,995 at 2.49% for 60 months? Please show work
Monday, December 8, 2014 at 8:52pm

math
A scale drawing of your classroom is 4 inches by 6 inches. If one inch represents 8 feet, what is the actual size of your classroom? I think I know the answer, jst having trouble figuring out how to write it down & show it. I think it's 32 feet by 48 feet. Help! Thanks
Monday, December 8, 2014 at 8:29pm

math
there are 13 more girls than boys on the playground. there are 22 boys. how many girls are on the playground
Monday, December 8, 2014 at 7:56pm

Math
The scale of the map is missing. The actual distance from Liberty to West Quall is 72 miles, and it is 6 inches on the map. What is the scale of the map?
Monday, December 8, 2014 at 7:56pm

Math
On an airplane, there are two seats on the left side in each row and three seats on the right side. There are 90 seats on the right side of the plane. How many seats are on the left side of the plane? How many seats are there altogether?
Monday, December 8, 2014 at 7:54pm

math
12 3/4 feet long by 11 1/2 feet wide is how many square feet
Monday, December 8, 2014 at 7:53pm

Math
A machine can produce 27 inches of ribbon every 3 minutes. How many feet of ribbon can the machine make in one hour? Explain.
Monday, December 8, 2014 at 7:51pm

Math Help
1. 77 is what percent of 192? A. x/100=77/192;4.01%**** B. x/100=77/192;40.1% C. x/77=100/192;77.3% D. x/100=192/77;249.4% 2.Of the 80 eigth-graders, 32 are going on the class retreat. What percnt of the eigth grade going on the retreat? A. 25% B. 55% C. 40% D. 32%*** 3. ...
Monday, December 8, 2014 at 7:48pm

Math
Carrie and Krystal are taking a road trip from Greenville and North Valley . On Carries's map, Greenville and North Valley are 4.5 inches apart. The scale is 1 inch=20 miles. How far is Greenville from North Valley? The scale on Kystal's map is 1=18 miles. How far ...
Monday, December 8, 2014 at 7:47pm

Math Help
Tom buys a shirt for $22.00 plus 7% sales tax. His cousin buys a shirt for $18.00 plus 4% sales tax. a. How much do Tom and his cousin pay for the shirts? Show your work b. Who spent more on tax My answers $22.00*7%=1.54 $22.00+1.54=$23.54 $18.00*4%=0.72 $18.00+0.72=$18.72 Tom...
Monday, December 8, 2014 at 7:37pm

Math
marble | number ——————​1;— Blue. |. 8 Red. |. 4 Purple. |. 6 Use the table to write the ratio. 1. Purple: marbles 2 marbles to blue
Monday, December 8, 2014 at 7:33pm

Math
How to find x intercept
Monday, December 8, 2014 at 7:19pm

Math Help
Forks:Spoons There are 7 forks and 5 spoons. What's the ratio? Explain what the ratio means. I know what the ratio is its 7:5 right? I just need help on the second one. How do I explain it?
Monday, December 8, 2014 at 7:11pm

Math
Find x and y intercepts of y=sinx-cos^2x on [0, 2pi]
Monday, December 8, 2014 at 7:05pm

math
what x 12 is close to 57 12 divided by 5.79 = That is what I am trying to figure out so i skipped 5 and move on to 57 in the problem and i need to know what x 12 = close to 57
Monday, December 8, 2014 at 6:59pm

5th grade math
Q. The Johnson family has been very busy and has not done there laundry for several weeks. The dirty laundry pile consists 540 items of clothing. They figure they can put average of 27 pieces of clothing in a single load. How many loads if laundry will the Johnson family have ...
Monday, December 8, 2014 at 6:57pm

Math (Answer ASAP)
Find the right value for arcsin (-1/2).
Monday, December 8, 2014 at 6:53pm

math
Let S be the part of the sphere x^2 + y^2 + z^2 = 25 that lies above the plane z = 4. Let S have constant density k. (a) Find the center of mass. (b) Find the moment of inertia about the z-axis. so far I have found that the magnitude of r(theta)x r(thi)= 25sin(thi)but I cant ...
Monday, December 8, 2014 at 6:50pm

math
Let S be the part of the sphere x^2 + y^2 + z^2 = 25 that lies above the plane z = 4. Let S have constant density k. (a) Find the center of mass. (b) Find the moment of inertia about the z-axis.
Monday, December 8, 2014 at 6:45pm

Math
Y=2sinx-cosx on [0, 2pi] Find x- and y-intercepts
Monday, December 8, 2014 at 6:40pm

Math Help
The population of town A increases from 1,346 to 1,500. In the same period, the population of town B increases from 1,546 to 1,800. a. Find the percent of increase in population for town A and for town B. b. Which town had the greater percent of increase? My answer town A. 1,...
Monday, December 8, 2014 at 6:28pm

Math
explain base 10
Monday, December 8, 2014 at 6:22pm

Math Help
1.Of the 80 eith-graders, 32 are going on the class retreat. What percent of the eith grade going on the retreat? A. 25% B. 55%*** C. 40% D. 32% 2.What is the sale price for a pair of shows that was originally prices at $54.99 and now is 20% off? A. $38.49 B. $41.24 C. $43.99...
Monday, December 8, 2014 at 6:00pm

Math
Tara's car travels about 25 miles on one gallon of gas. She has between 10 and 12 gallons of gas in the tank. List the independent and dependent quantities
Monday, December 8, 2014 at 5:49pm

Math Help
1.The Census Bureau estimates that in 2025, 20 of 50 states will have a Spanish-speaking majority. What percent of the states will have a Spanish-speaking majority? A. 20% B. 30% C. 40%*** D. 50% 2. What percent of 25 is 10? A. 10=p*25;40% B. 10=p*25;250% C. 25=p*10;40% D. 25=...
Monday, December 8, 2014 at 5:47pm

Math
How to find Domain and Range of parallelogram
Monday, December 8, 2014 at 5:42pm

Math Help
1.Liam wants to buy a bicycle that costs $290.00. His parents say Liam must raise 40% of the money himself. How much money must Liam raise? A. $112.00 B. $40.00 C. $116.00*** D. $87.00 2.Solve the proportion using cross products 29 miles/58 hours=10 miles/ h hours A. 10 B. 20...
Monday, December 8, 2014 at 5:31pm

Math Help
1.Write the fraction 8/9 as a percent. Round to the nearest hundereth of a percent where necessary. A. 88.89%*** B. 1.13% C. 44.44% D. 66.67% 2.Write the decimal 0.237 as a percent. A. 0.237% B. 2.37% C. 23.7%*** D. 237% 3.Jerry sold 7/20 of the total number of tickets that ...
Monday, December 8, 2014 at 5:17pm

Math
Tennis racket marked up 50% to $36.75
Monday, December 8, 2014 at 5:11pm

Math
Andre says that 5 3/4 +2 1/4=7 because 7 4/8=71/2 what is his mistake ?
Monday, December 8, 2014 at 5:01pm

Math
A punch recipe says to mix 4 cups of pineapple juice, 8 cups of orange juice, and 12 cups seltzer in order to make 18 servings of punch. How many cups of each ingredient do you need to make 108 cups of punch? ----- cups of pineapple juice ----- cups orange juice - ----- cups ...
Monday, December 8, 2014 at 4:49pm

math- weighted averages
Santa tasted 500 ml of a 60% solution of eggnog. How many milliliters of a 30% eggnog solution should be added to obtain a 50% solution?
Monday, December 8, 2014 at 4:46pm

Math
It took sandy two hours to jog 13 miles.she ran 7/12 miles in the first hour how far did she run during the second hour
Monday, December 8, 2014 at 4:41pm

Math
How do I find the scale of a map?
Monday, December 8, 2014 at 4:41pm

Math
The LCD for the fractions 1/3, 3/4, 5/32, and 8/9 is
Monday, December 8, 2014 at 4:12pm

Math
At the tournament, team A scored 192.586 points. Team B scored 170.399 points. How many more points did team A score than team B?
Monday, December 8, 2014 at 4:03pm

Math
Write an algebraic expression for the following: Five more than the quotient of a number and 2
Monday, December 8, 2014 at 3:52pm

Math
What is the value of the expression? 63-6^2 divided by 2
Monday, December 8, 2014 at 3:50pm

square feet math
If the lenght is 14 ft. and the area is 70sq. ft.what is the width?
Monday, December 8, 2014 at 3:36pm

12 Math
Evaluate each logarithm. log^2(subscript)36^3
Monday, December 8, 2014 at 3:17pm

Math
Which of the following equations has an infinite number of solutions? 3x - 3 = -4x 2y + 4 - y = 16 7x + 5 = 4x + 5 + 3x 6y - 2 = 2y - 1
Monday, December 8, 2014 at 1:54pm

math
Evaluate 2/(1+J4)^2 I got as far as: (1+j4)^2=(1+j4)(1+j4)=1+j4+j4+j4^2=1+J24​ OR (1+j4)^2 (/2) =(0.25+j)(0.25+j)=0.0625+j+j+j^2 =0.0625+j+j-0.0625=J^2 I think it can be take further. but im not sure i'm right.
Monday, December 8, 2014 at 1:38pm

math
A, B, C and D each had some money. D doubled the amounts with the others. C then doubled the amounts with others. B then doubled the amounts with the others. A then doubled the amounts with the others. At this stage, each of them has $80. Find the initial amount with C. Help ...
Monday, December 8, 2014 at 1:26pm

Math
How would I simplify this quadratic equation: y=-15/20.25(x^2+3x+2.25)+0 This is my work already done the original equation I was given but I need help simplifying the equation I have found.
Monday, December 8, 2014 at 12:20pm

Math
When fully simplified, ignoring non-permissible values, 12x^12/4x^3 divided by x^8/24x^6? a)72x^3 b)1/72x^7 c)1/72x^3 d)72x^7
Monday, December 8, 2014 at 12:18pm

MATH
A facility has a curent salary budget of $750,000 with a planned salary increase for the next year of 3.5%. Inflation will impact the expense budget by 5%. WHAT WILL BE THE SALARY BUDGET FOR NEXT YEAR?
Monday, December 8, 2014 at 12:12pm

math
A fair 6 sided dice is marked with the numbers 1, 2, 3, 4,5, and 6. The dice is rolled three times and the results are added. How many different sums are possible?
Monday, December 8, 2014 at 11:38am

math
What is the approximate cost of florring for a 40ft by 40ft meeting room if half of the room will be carpet at $25 per square yard and other half will be VCT at $2.50 per square foot?
Monday, December 8, 2014 at 11:12am

math
A total of $8000 is invested: part at 8% and the remainder at 12% . How much is invested at each rate if the annual interest is $650 ?
Monday, December 8, 2014 at 11:07am

BUSINESS MATH
: The Crescent Corporation just paid a dividend of $2 per share and is expected to continue paying the same amount each year for the next 4 years. If you have a required rate of return of 13%, plan to hold the stock for 4 years, and are confident that it will sell for $30 at ...
Monday, December 8, 2014 at 11:03am

BUSINESS MATH
Moore Company is about to issue a bond with semiannual coupon payments, a coupon rate of 8%, and par value of $1,000. The yield-to-maturity for this bond is 10%.
Monday, December 8, 2014 at 10:52am

BUSINESS MATH
Part B: The Crescent Corporation just paid a dividend of $2 per share and is expected to continue paying the same amount each year for the next 4 years. If you have a required rate of return of 13%, plan to hold the stock for 4 years, and are confident that it will sell for $...
Monday, December 8, 2014 at 10:49am

BUSINESS MATH
The Crescent Corporation just paid a dividend of $2 per share and is expected to continue paying the same amount each year for the next 4 years. If you have a required rate of return of 13%, plan to hold the stock for 4 years, and are confident that it will sell for $30 at the...
Monday, December 8, 2014 at 10:47am

Math
y=4-2x^2+1/6x^4 How to find x and y-intercepts. I think y=0 but I don't know how to solve for the x-intercept.
Monday, December 8, 2014 at 10:36am

Math
Find the exact value: 1.) cos^-1(sin(pi/2)) 2.) arccos(cos(7pi/2))
Monday, December 8, 2014 at 8:03am

Algebra
I need help with my math pizzazz worksheet page 167 1.3x-5y=13 X-2y=5 2.7x-2y=-1 3x-4y=19 3.2x+3y=7 3x+4y=10
Monday, December 8, 2014 at 6:36am

math
John and Smith went to a stationery shop. John bought 6 pens, 4 pencils and 3 erasers. Smith bought 3 pens, 8 pencils and 6 erasers and spent 20% more than John. What percentage money did John spend on pens? How can I form an equation and solve?
Monday, December 8, 2014 at 6:34am

math
The sum of two numbers is 4 and the reciprocal of one exceeds the reciprocal of other by twice the product of their reciprocals. What is the product of the reciprocals of two numbers? Please help me solving.
Monday, December 8, 2014 at 2:41am

Math (TRIG)
Please help me set up these problems. 1.) Find an equivalent equation in rectangular coordinates. r(1 - 2 cos θ) = 1 2.) Find a rectangular equation for the plane curve defined by the parametric equations. x = sec t, y = tan 3.) A projectile is fired with an initial ...
Monday, December 8, 2014 at 1:01am

Trig (math)
1.) Find all solutions of the equation. Leave answers in trigonometric form. x^2 + 1 - sqrt3i = 0 2.) Give the rectangular coordinates for the point. (9, 2pi/3) 3.) The rectangular coordinates of a point are given. Express the point in polar coordinates with r L 0 and 0° K...
Monday, December 8, 2014 at 12:21am

math
Francis is baking cookies. The recipe for chocolate chip cookies calls for 2 2/3 cups of flour, the recipe for peanut butter coolies calls for 2.75 cups, the recipe for ginger snaps calls for 5/2 cups. If francis wants to use as little flour as possible, which cookie whould he...
Monday, December 8, 2014 at 12:03am

math
An animal shelter has 24 large cages and 42 small cages that need to be cleaned. The director of the shelter wants to divide the work so that each person cleans the same number of large cages and the same number of small cages. What is the largest number of people he can use ...
Monday, December 8, 2014 at 12:00am

Trig (math)
1.) Write the complex number in trigonometric form r(cos theta + i sin theta) with theta in the interval [0°, 360°). 9 sqrt 3 + 9i 2.) Find the product. Write the product in rectangular form, using exact values. [4 cis 30°] [5 cis 120°] 3.) [4(cos 135° + i ...
Sunday, December 7, 2014 at 11:23pm

Math
The Empire Carpet Company orders merchandise for $14,486, including $475 in shipping charges, from Mohawk Carpet Mills on May 4. Carpets valued at $1,453 will be returned because they are damaged. The terms of sale are 2/10, n/30 ROG. The shipment arrives on May 26, and Empire...
Sunday, December 7, 2014 at 10:50pm

math
Compute Mary's estimated tax payment for the first quarter. She is self-employed and she expects to earn $61,440 this year. Her estimated income tax rate is 22%. For self-employed persons, social security tax is 12.4% of wages up to $106,800, and Medicare tax is 2.9% of ...
Sunday, December 7, 2014 at 10:47pm

Math
An object is dropped from a balloon from a height of 500m. (a) How long does it take to reach the ground? (b) If the object has an initial velocity of 12m/s, how long does it take to reach the ground? How far will it fall in 5 secnds?
Sunday, December 7, 2014 at 10:23pm

Math
Jeremy has 19 coins of 2 different values. The total value of the coins is $1.00. What are the coins? How many of each coin does he have? Explain please
Sunday, December 7, 2014 at 10:23pm

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