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February 28, 2015

Homework Help: Math

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Recent Math Questions

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math
A number consist of two digits whose sum is 8. if 18 is added to the number its digits are reversed. find the number.
Thursday, January 15, 2015 at 6:16am

MAth Igcse
The angle of elevation of the top of a tower is 27 degrees from point A due east of it. The angle of elevation of the top of the tower is 11 degrees from another point B due south of the tower. Find the height of the tower if the distance AB is 40m.
Thursday, January 15, 2015 at 5:09am

precalculus
Sin(x+y)cos(x-y)= 1/2sin2x+ 1/2 sin2y Help please I have no idea how to do this because my math class never did it but while making the final review for the chapter I was assigned, I put this one in it. They are going to all ask me how to do it. Sin(x+y)cos(x-y)= 1/2sin2x+ 1/...
Thursday, January 15, 2015 at 3:12am

math
al has 7 1/2 pounds of flour. he used 3/4 of the flour to make bagels. how many pounds of flour did he use?
Thursday, January 15, 2015 at 1:45am

math(5th grade)
Garrett reads 2.8 pages in 3.5 minutes how much does Garrett read in 31.5 minutes
Thursday, January 15, 2015 at 12:49am

math
how many cars are there in a long freight train, if it takes the entire train 4.50 minutes to pass a station at 25.0 miles per hour? Each car is 45.0 feet long. There are 5280.0 feet in a mile.
Thursday, January 15, 2015 at 12:48am

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. (A)What is the scale of the map? (B)Foston is between Liberty and West Quall and is 4 inches from Liberty on the map.How far is Foston from West Quall?
Thursday, January 15, 2015 at 12:22am

math
factorise 4(x-y)^3-(x-y)
Thursday, January 15, 2015 at 12:15am

Math
Find T 2200=7500/(1+9e^-o.o21972*T) Can I multiply both sides by 1+9e^-0.021972*T ?
Wednesday, January 14, 2015 at 11:57pm

Math
When Minnesota became a state in 1858 there were approximately 150,000 people living here. in the 2010 census the population for Minnesota was 5,303,925 people. Find a model that would apprxoimate the population in Minnesota between 1858 and 2010. Let t=0 correspond to 1858. ...
Wednesday, January 14, 2015 at 11:32pm

Math
Henry Devine bought a new dishwasher for $320. He paid $20 down and made 10 monthly payments of $34. What actual yearly interest rate did Henry pay?      A. 68.75 B. 14.55 C. 34.38 D. 29.09 The answer is B?
Wednesday, January 14, 2015 at 11:19pm

Math
.   If three bags of birdseed cost $14.16, how much will 14 bags cost?      A. $33.71 B. $30.34 C. $70.80 D.$66.08 The answer is D?
Wednesday, January 14, 2015 at 11:03pm

Math
Carlos Martin received a statement from his bank showing a balance of $56.75 as of March 15th. His checkbook shows a balance of $87.37 as of March 20. The bank returned all the cancelled checks but two. One check was for $5.00 and the other was for $13.25. How much did Carlos ...
Wednesday, January 14, 2015 at 10:52pm

Math
Can someone check my answer down below?
Wednesday, January 14, 2015 at 10:41pm

Math
I don't know how to solve this problem. Cameron can run3.6 miles for every 1.9 miles that Samantha ran. If Samantha ran 7.4 miles, how far did Cameron run.
Wednesday, January 14, 2015 at 10:29pm

math
what is the ratio of the measurements 6/12=2.5/5 in simplest form a.2:1 b.6:12 c.1:2 d.none of these
Wednesday, January 14, 2015 at 10:26pm

Math
In a jar the number of blue marbles = twice the number of red marbles! there are 24 more blue marbles than red. How many red and blue marbles are in the jar?
Wednesday, January 14, 2015 at 10:25pm

math
The line y=16x intersects the quadratic function y=x^2 at two points. What are the coordinates of the two points of intersection?
Wednesday, January 14, 2015 at 10:21pm

Math
Carlos Martin received a statement from his bank showing a balance of $56.75 as of March 15th. His checkbook shows a balance of $87.37 as of March 20. The bank returned all the cancelled checks but two. One check was for $5.00 and the other was for $13.25. How much did Carlos ...
Wednesday, January 14, 2015 at 10:17pm

math
there is to right traingles and we have to find the missing side the first traingle has 4 on the bottom and 2 as its height the second trangle has a 9 on the bottom and the x as the height which number is x. a.4.5 b.18 c.8 d.2.25 i think a
Wednesday, January 14, 2015 at 10:10pm

math
Hi could you see if I did this one right The pie chart below shows how the total annual income for a certain family is spent. If the amount budgeted for Housing and Entertainment combined is$25,200 , what is the total family income? Housing is 22% and entertainment is 14%. I ...
Wednesday, January 14, 2015 at 10:04pm

math
Solve the following system of equations: y=4x y=2x^2
Wednesday, January 14, 2015 at 10:01pm

math
What are the solutions for the following system of equations? y=8x+7 y=-x^2-5x+7
Wednesday, January 14, 2015 at 9:56pm

math
The line y=9x-4 intersects the quadratic function y=x^2+7x at one point. What are the coordinates of the point of intersection?
Wednesday, January 14, 2015 at 9:56pm

math
12/6 =5/2.5 a.2:1 b.6:12 c.1:2 d.none of these
Wednesday, January 14, 2015 at 9:52pm

Consumer math
  John Davis makes $9.75 an hour. He works four hours on Monday, six hours on Tuesday, five hours on Wednesday, five hours on Thursday, and seven hours on Friday. What is his gross pay?      A. $132.70 B. $174.20 C. $269.98 D...
Wednesday, January 14, 2015 at 9:32pm

Math
Solve the following system of equations using both substitutio and elimination y=-x+4 y=-2x-4 Do I do what I do with the previous problems
Wednesday, January 14, 2015 at 9:07pm

Math
The letter of application is intended to       A. accompan​y your portfolio. B. remind the prospective employer of your recent interview. C. outline your value to a prospective employer. D. find out what the prospective ...
Wednesday, January 14, 2015 at 9:05pm

Math
5x-4y=10 -10x+2y=-20 If x is 2 what would y be? When I plug it in I get y as 0
Wednesday, January 14, 2015 at 8:56pm

Math
2x-5y=53 -x+5y=-44 Find x and y for both equations My answer : x=9 and y=-7?
Wednesday, January 14, 2015 at 8:54pm

math
eliza has a piece of string that is 130 cm long how much will she have to cut to make 1 meter
Wednesday, January 14, 2015 at 8:53pm

Math
The top of Kevin's dining room table is 4 feet long, and 3 feet wide. Kevin wants to cover the middle of the table with tiles. He plans to leave a 6 inch border around the edge of the table and tile in the center. How many square feet of tile will he need?
Wednesday, January 14, 2015 at 8:52pm

Math
-3x+5y=80 4x-5y=-90 What are the x and y for both equations
Wednesday, January 14, 2015 at 8:36pm

math
At a given time, Saturn was 9.1 x 10 to the 8th miles from the sun and the earth was 9.3 x 10 to the 7th miles from the sun. by what distance is one planet closer to the sun than the other planets?
Wednesday, January 14, 2015 at 8:17pm

Sixth Grade Math
Last year, Mark was 46 inches tall. This year, Mark's height is 3 inches less than Pter's height. Peter is 51 inches tall. How tall is Mark? Write an equation to represent the situation. Then solve the equation. Answer: 51-3=I I=48 inches tall I=number of inches Did I ...
Wednesday, January 14, 2015 at 8:13pm

MATH!!!! AHHH!!!
Im studying for finals! A system of equations is shown below: 8x + 5y = 9 3x + 2y = 4 Part A: Create an equivalent system of equations by replacing one equation with the sum of that equation and a multiple of the other. Show the steps to do this. Part B: Show that the ...
Wednesday, January 14, 2015 at 8:11pm

Math
  The letter of application is intended to      A. accompan​y your portfolio. B. remind the prospective employer of your recent interview. C. outline your value to a prospective employer. D. find out what the ...
Wednesday, January 14, 2015 at 8:03pm

Math
5x-4y=10 -10x+2y=-20 What are the values of the x and y for both equations
Wednesday, January 14, 2015 at 7:53pm

Math
about 24.8 million people live in texas. about 0.6 million live in vermont. how many times as many people live in texas than in vermont. round to the nearest tenth if necessary. i got 41.333 (41) as my answer.am i correct
Wednesday, January 14, 2015 at 7:49pm

Math
 Phil Smith is a car salesman. Last week his total sales amounted to $27,650.00, and he received $1,382.50 in commission. What is his rate of commission?      A. 4.8 percent B. 5 percent C. 23 percent D. 17 percent I think C or...
Wednesday, January 14, 2015 at 7:46pm

Math
  The tax rate on Ned Topolino's $112,000 vacation home is 25 mills. The property is assessed at full value. How much will Ned pay in taxes this year?      A. $2,800 B. $780 C. $7,800 D. $28,000 A?
Wednesday, January 14, 2015 at 7:31pm

math
China population is approximately 1.325 billion. The United States has approximately 0.304 billion. How many times as many people live in China than in the U.S. Round to the nearest tenth if necessary.
Wednesday, January 14, 2015 at 7:30pm

math
lake superior has a maximum depth of 1.333 thousand feet. there are 5,280 feet in one mile. how deep is lake superior in miles? round to the nearest hundredth if necessary. explain the answer
Wednesday, January 14, 2015 at 7:25pm

Math
Mr. Jenkins is going to buy museum tickets for a class trip. The museum director quotes him the following prices: • 20 tickets cost a total of $250. • 30 tickets cost a total of $375. • 50 tickets cost a total of $625. a. Based on these prices, is the cost of ...
Wednesday, January 14, 2015 at 7:08pm

Math
Fiona earns $15 for each lawn she mows. What is the inequality to find out how many lawns she must mow to earn at least $135. My answer 15m <_ 135 M<_ 9
Wednesday, January 14, 2015 at 6:39pm

Math
4.   Jan Quint earns $7.00 an hour at her job and is entitled to time-and-a-half for overtime, and double time on holidays. Last week she worked 40 hours of regular time, 9 hours of overtime, and 12 hours of holiday time. How much did she earn last week?   ...
Wednesday, January 14, 2015 at 6:39pm

Math
Gabriella is x years old.Her sister Felicia,is six years old than she is.Their mother is twice as old as Felicia.Their aunt,Tanya,is x years older than their mother.Write and simplify an expression that represents Tanya's age in years.
Wednesday, January 14, 2015 at 6:39pm

math
I have to find the unit rate 3\5 divided by 3\8 and ui can't figure out how you would get 3\8 to one?
Wednesday, January 14, 2015 at 6:39pm

math
Laura’s pet bunny, Ghost, hops up a flight of 12 stairs. Ghost can hop up one or two steps at a time, and never hops down. How many ways can Ghost reach the top
Wednesday, January 14, 2015 at 6:35pm

Math
8x+5=4x-7 I put x=-3
Wednesday, January 14, 2015 at 6:27pm

Math
Laney buys 3 containers of yogurt. She has coupons for $0.35 off the regular price of each container. After using the coupons, the total cost of the yogurt is $3.45. What is the regular price of a container of yogurt? ?????? No idea
Wednesday, January 14, 2015 at 6:25pm

math
what is the total cost for 4 1/10 pounds of vanilla pudding? vanilla pudding=$7/lb
Wednesday, January 14, 2015 at 6:18pm

Math
A true crab has 4 fewer than twice the number of legs that a hermit crab has. The hermit crab has 6 legs. How many legs does the true crab have? I put for the equation 4c =6 *2 I am confused
Wednesday, January 14, 2015 at 6:16pm

Math
Julie, Samantha and Dave ate 5416 crackers last year. Julie ate 1615 crackers. Samantha ate 6 times as many as dave. How many crackers did Samantha eat?
Wednesday, January 14, 2015 at 6:07pm

Math
Dylan ate 0.4 of the his brother ate 3/10 of the pie Who ate more
Wednesday, January 14, 2015 at 6:04pm

Math equation
Question1 The difference of a number and 7 is -8 I put n-7=-8 Is that correct? Question 2 Six less than the product of four and a number is -5 I put 6-4n= -5
Wednesday, January 14, 2015 at 5:58pm

math
Question: You can type 115 words in three minutes. About how many words can you type in seven minutes?
Wednesday, January 14, 2015 at 5:52pm

math
An observer stands 25 feet from the base of a 50 foot flagpole and watches a flag being lowered at a rate of 5 ft/sec. Determine the rare at which the angle of elevation from the observer to the flag is changing at the instant that the flag is 25 ft. Keep getting like .1 or .2...
Wednesday, January 14, 2015 at 5:49pm

Math
3.   The tax rate on Harriet Walker's $80,000 vacation home is 20 mills. The property is assessed at full value. How much will Harriet Walker pay in taxes this year?      A. $1,600 B. $2,000 C. $640 D. $440 B?
Wednesday, January 14, 2015 at 5:48pm

Math
A 120-ft long playground is just 15-in on the scale drawing.What is the scale on the scale drawing? How would you solve this question?
Wednesday, January 14, 2015 at 5:43pm

Math
1/9x + 3= -1 I put 1/9x =2 X=18
Wednesday, January 14, 2015 at 5:34pm

Math 7th grade
1/15 =3/5m For my answer, I put m= 1/5 Is that correct?
Wednesday, January 14, 2015 at 5:17pm

Math.
A new $20 weighs approximately 0.5 gram. Write a linear function that shows the weight of x $20 bills. - Part b. How much do 120 $20 bills weigh? Please Help!!
Wednesday, January 14, 2015 at 5:15pm

Math
7x-10x=9 My answer x= -3
Wednesday, January 14, 2015 at 5:13pm

Math
An annual pass covering entrance fees to more than 2000 national parks cost $80. If the total income from the annual passes is $12,800 in one month. Write the equation and solve it. For my equation I put 12800p=80
Wednesday, January 14, 2015 at 5:11pm

math
4 PART Your weight on different planets is affected by gravity. An object that weighs 150 pounds on Earth weighs only 56.55 pounds on Mars. The same object weighs only 24.9 pounds on the Moon. A)What percent of an object's Earth weight is its weight on Mars and on the Moon...
Wednesday, January 14, 2015 at 5:00pm

math
I just want to see if my answers are correct and if no, can you please show your work and explain how to do it? Thank you. A. (x^1/2)^4√x^6 I got an answer of x^2x B. √x^4y^12 I got an answer of xy C. 3√a^6b^3 I got an answer of a^2b D. (x^1/3y)^3√x^2y^...
Wednesday, January 14, 2015 at 4:56pm

math
I just want to see if my answers are correct and if no, can you please show your work and explain how to do it? Thank you. A. (x^1/2)^4√x^6 I got an answer of x^2x B. √x^4y^12 I got an answer of xy C. 3√a^6b^3 I got an answer of a^2b D. (x^1/3y)^3√x^2y^...
Wednesday, January 14, 2015 at 4:31pm

Math
Andie bought 4.85 meters of cord. The cord costs $0.98 per meter. What was the total cost of the cord? My answer is $5.83 Is that correct?
Wednesday, January 14, 2015 at 4:06pm

Math
Write an expression that is equivalent to 6(4+x)
Wednesday, January 14, 2015 at 4:01pm

math
the waiting time for a roller coaster is 20 minutes if 150 people are in line how long will you wait if 240 people are in line
Wednesday, January 14, 2015 at 3:25pm

math
a shopkeeper after allowing a discount of 10% on the market price makes a profit of 8%.what percent above the cost price is it market.
Wednesday, January 14, 2015 at 2:36pm

math
Does the Commutative Property apply to this situation? I ate dinner and read a book. I got = Yes.
Wednesday, January 14, 2015 at 2:18pm

math
If Jim is twice as old as Jerry plus six, Jerry is three years older than Tom, and Tom is 12, how old is Jim? I got = Jim is 36
Wednesday, January 14, 2015 at 1:55pm

math
whats 9+10
Wednesday, January 14, 2015 at 12:52pm

math
Log[u/v] × log [s/t]
Wednesday, January 14, 2015 at 12:51pm

Math
Could someone please show how this is done or explain how to do it. thank you The pie chart below shows how the annual budget for a certain company is divided by department. If the amount budgeted for Editorial and Engineering combined is , what is the total annual budget? ...
Wednesday, January 14, 2015 at 12:46pm

math
You need to hire a part-time associate to work 30 hours a week in your store. You have $250 in labor budget for the new associate each week. You just interviewed an excellent candidate for the position who has requested to be paid $9.00 per hour. Your average part-time ...
Wednesday, January 14, 2015 at 12:20pm

math
how to slove 35cents:$2.25 in ratio
Wednesday, January 14, 2015 at 11:04am

Math
5. A system of linear inequalities is shown below: x + y ≥ 4 y < 2x – 3 Describe the steps to graph the solution set to the system of inequalities. Be specific. (10 points)
Wednesday, January 14, 2015 at 9:07am

math
you have 2 pennies, 3 nickels, 1 dime and 2 quarters. how many different sums of money can you make using one or more of these 8 coins
Wednesday, January 14, 2015 at 9:01am

B.S,geography,agricultural sciences and math l
will i be able to study low at ukzn or tut or wherever with my learing areas
Wednesday, January 14, 2015 at 4:42am

B.S,geography,agricultural sciences and math l
will i be able to do nursing at ukzn with those subjects
Wednesday, January 14, 2015 at 4:39am

math pow
there are about 20 potatoes in a five pound bag and restaurant uses about two potatoes per order of french fries how much money does the restaurant taking on a day that they use 400 pounds of potatoes
Tuesday, January 13, 2015 at 11:18pm

math
A bag contains the following marbles:6 red,4 orange,3 yellow,2 blue and 5 green. You choose a marble at random and do not replace it. Then you select another marble. P(red,then blue)3/95 P(orange,then blue) 2/95 P(blue,then yellow) 3/190 P(red,then yellow) 9/190 P(blue,then ...
Tuesday, January 13, 2015 at 10:22pm

Math
Of the vehicles on the road, 1/2 are cars and 1/8 are motorcycles. What fraction of the vehicles are not cars or motorcycles?
Tuesday, January 13, 2015 at 10:19pm

math
If the width of the image is 5 inches and the width of the preimage was x. What is the scale factor and center of dilation at the origin
Tuesday, January 13, 2015 at 10:16pm

Math
Jeffrey biked to the store at 12 miles an hour but took his time on the way home going 8 miles an hour. If it took him 20 minutes to get to the store, how many minutes did it take him to get back?
Tuesday, January 13, 2015 at 10:12pm

Math
Example of a real-world relationship where there is no clear independent or dependent variable.
Tuesday, January 13, 2015 at 10:12pm

Math
Given f(x)=-2-3x-x^2 , find f(1+k)
Tuesday, January 13, 2015 at 10:11pm

Math
Elizabeth took 13 minutes less than twice as long as Heather to solve the puzzle if their total time together was 23 minutes who took less time to solve the puzzle? How much less?
Tuesday, January 13, 2015 at 10:11pm

Math
The 80 8th graders took a trip. The boys numbered 16 fewer than twice the number of girls. How many of the eighth graders are girls?
Tuesday, January 13, 2015 at 10:09pm

math
For a carnival game, a cube is rolled.Each of its six faces has a different color. To win,you must select the color rolled.Find the probability of playing the carnival game twice and winning both times. B.suppose for the game,you choose red and your friend picks blue. What is ...
Tuesday, January 13, 2015 at 10:06pm

Math
A flagpole casts a shadow of 23.5 feet long.at the same time of day, Ana, who is 5.5 feet tall, casts a shadow that is 7.5 feet long. How tall in feet is the flagpole?
Tuesday, January 13, 2015 at 9:24pm

Math
ling has 4m pounds of flour. she buys another 2 packages of flour, each weighing m pounds. how much pounds does ling have in terms of m
Tuesday, January 13, 2015 at 9:04pm

Math
It takes Jaiden 5 and 3/4 hours to do her homework each week. It takes her 2 and 3/4 hours to complete her science and 1 and 1/2 hours to complete her math homework. How long does it take her to complete Social Studies homework? Use the numbers and symbols, listed below, to ...
Tuesday, January 13, 2015 at 8:57pm

Algebra- Middle
My math question ask is 1/3(x-9) = 2x+7 greater than or less than 4/3(x+4)= -4x. The problem (1) answer = 6. Problem (2) answer = -1. Therefore problem (2) is less than problem (1). Are the answer to the equations correct. Sincerely
Tuesday, January 13, 2015 at 8:34pm

math
Problem: A ball is dropped from the top of a building that is 250 feet tall. The height h of the ball in feet after t seconds is modeled by the function h = -16t2 +250. How long will it take for the ball to reach the ground? Round your answer to the nearest tenth if necessary.
Tuesday, January 13, 2015 at 8:31pm

Math
On a winter's day, 9 degrees Fahrenheit is th highest temperature recorded. Which inequality represents the temperature, t, in degrees Fahrenheit, at any time on this day?
Tuesday, January 13, 2015 at 8:09pm

algebra
My math problem is -2(2+3)-2k = -2-4(2+2) My answer is k=20 is this answer correct.
Tuesday, January 13, 2015 at 8:06pm

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