Monday
February 8, 2016

Homework Help: Math

Branches of Math

Recent Math Questions

7th grade math
Suppose 36 videos are added to a video collection that has 24 videos. What is the percentage of change. I got 50 percent....my mom says it's 150 percent. thanks!
Tuesday, January 5, 2016 by Peggy

7th grade math
A biology class has 28 students. Four of the students transferred out to take chemistry. Find the percent of change in the number of students in the biology class. I got 86 percent change is that right? Thank you...My mom says it's 14.3 %
Tuesday, January 5, 2016 by Peggy

7th grade math
Suppose 36 videos are added to a video collection that has 24 videos. What is the percent of change?
Tuesday, January 5, 2016 by Peggy

math 7th grade
If after the holiday season, the average number of customers per day at the Game Galaxy store decreased from 612 to 450. Find the percent of decrease thank you
Tuesday, January 5, 2016 by Peggy

Math
how do i solve for t and turn this equation into a sin function d(t)=-8cos(pi(t)/30)+8
Tuesday, January 5, 2016 by Chris

math
Mrs. Lum bought 6 rolls of pink ribbon and some rolls of yellow ribbon. he total cost of the rolls of ribbon was $27. Each roll cost $3. How many rolls of yellow ribbon did M. Lum buy?
Tuesday, January 5, 2016 by Tam

Math
Sylvie's age is 5 years less half of Katie's age. If sylvie is 11 years old, what is Katie's age?
Tuesday, January 5, 2016 by Kurtani

5th grade math
How do I solve this problem. Should I multiply. Ms. Hodge is baking cupcakes. She uses 3/4 cups of sugar for each batch of cupcakes. she bakes 5 batches of cupcakes. How many cups of sugar did she use
Tuesday, January 5, 2016 by Desmond

Math
1. Identify the sequence. 3,888, 216, 12, 2/3... a. arithmetic b. geometric c. neither d. both 2. Find the value of the variables in the table. x = e, 5, 7, 10, 12 y = 18, 23, f, 48, 58 a. f = 33; e = 4 b. e = 33; f = 4 c. f = 30; e = 2 d. e = 30; 5 = 2 3. Which is D = 2zv ...
Tuesday, January 5, 2016 by Harley Esther

math
If mary scored 18 marks our of 25.What was her percentage score?
Tuesday, January 5, 2016 by shanelle

Math
find an equation for the line tangent to the graph of y=arccot(x) at x=1. I found that slope is -1/(1+x^2). I don't know how to evaluate arccot(1) to find y value.
Tuesday, January 5, 2016 by Bob

Math
Write a linear system of equations that can be used to solve these problems. Then, solve to get your final answer. Please help me solve this. 2. The Clippers scored a total of 80 points in a basketball game against the Bulls. The Clippers made a total of 37 two-point and three...
Tuesday, January 5, 2016 by LadyPhantomhive

(Math) Help me solve this Pls.
Write a linear system of equations that can be used to solve these problems. Then, solve to get your final answer 1. An exam worth 145 points contains 50 questions. Some of the questions are worth two points and some are worth five points. How many two point questions are on ...
Tuesday, January 5, 2016 by LadyPhantomhive

Math
An equilateral triangle has a perimeter of 45 ft. What is the length of each side if the triangle?
Tuesday, January 5, 2016 by Anonymous

Math
Jose says that100 is a perfect square. How can Jose justify his statement?
Tuesday, January 5, 2016 by Anonymous

math
A population of 240 birds increases at a rate of 16% annually. Jemel writes an exponential function of the form f(x) =abx to represent the number of birds after x years. Which values should she use for a and b?
Tuesday, January 5, 2016 by matt

Math???Plase Help
2/9 of a fence is painted red and the other part is painted green.The fraction of the fence painted green is?
Tuesday, January 5, 2016 by Jaslyn

Math
If a person throws 3 darts at a dartboard, how many possible combinations are there to get a sum of 34?
Tuesday, January 5, 2016 by Bill

Math
Mary cut pizza into 16 slices. If she gave 3/8 of the pizza to her friend, how many slices of pizza did she give away
Tuesday, January 5, 2016 by April

math
3x^4-4/(x+2)^3
Tuesday, January 5, 2016 by Jerry

Math
How do I solve this: X = 25 8 4
Tuesday, January 5, 2016 by Amy

PLEASE CHECK MY MATH
What number is 73% of 215? (1 point) 215 = 0.73n n = 0.73 × 215 0.73 = n × 215 215 = 73n 2. What percent of 94 is 23? (1 point) n/94 = 23/100 23/94 = n/100 94/n = 23/100 23/94 = 100/n 3. 80 is 40% of what number? (1 point) 200 32 20 112 4. Find the commission on a...
Tuesday, January 5, 2016 by King Sombra

math
x+3/(x^2+2x+2)^2
Tuesday, January 5, 2016 by Damian

7 Grade Math
Melissa needs to subtract 10 5/8 from 12 6/8, what is her answer?
Tuesday, January 5, 2016 by Anonymous

math
Which number is equivalent to the values in the box
Tuesday, January 5, 2016 by Anonymous

Math
3 16/25 As a percent A. 3.64% B. 3.80% C. 364% D. 380%
Tuesday, January 5, 2016 by Layla

math
Can somebody please help me with this? Everyday for a week, he counts how many times each player can leg press 350 pounds. The following week, he has each player sprint 40 yards every day. The table shows the average number of leg-press reps and the average 40-yard dash time (...
Tuesday, January 5, 2016 by Lauren

Math
How many cups of juice if you need 3 1/4 cups for each batch and you make 3 1/2 batches?
Tuesday, January 5, 2016 by Jake

Math
Write three ratios equal to 7/35? A 1/7, 2/14, 3/21 B 5/7, 10/7, 15/7 C 7/35, 7/40, 7/45 D 1/5, 2/10, 3/15 I think it is C or D.
Tuesday, January 5, 2016 by StingRay2020

math
If a plant has grown 62 3/4 inches in 1 1/3 months, what is the growth in 1 month?
Tuesday, January 5, 2016 by shelly

math
A cat can walk 2,190 miles in 2 hours. How can 2,190/2 be written in expanded form? 1) 2,000+100+90/2 2)200+90+1/2 Write it in quotation form.
Tuesday, January 5, 2016 by ray

Math
A company is planning to produce and sell a new line of computers. The fixed cost will be $320,000 and it will cost $600 to produce each computer. Each computer will be sold for $800. 1. Write the cost function, C, of producing "x" computers.
Tuesday, January 5, 2016 by Anonymous

Math: Ratio
My son had the following word problem and I don't know where to begin:The ratio in the school gym of boys to girls is 4:3. 160 boys left the gym and the ratio became 4:5. How many girls are in the gym?
Tuesday, January 5, 2016 by Mom

math
How many different rectangular gardens can you make, whose dimensions are whole numbers, if you have 48 m. Of fencing materials and the width is at least 4 m? Consider a 6m by 18m rectangle the same as an 18m by 6m rectangle.
Tuesday, January 5, 2016 by brittany

Math
An owner of a company spends $25 on office supplies. The owner is left with $20. Write an equation to find how much money he originally had.
Tuesday, January 5, 2016 by Olivia

math
My thousandths digit is twice the tenths digit. My tenths digit is one less than the hundredths digit. If my hundredths digit is 5, what's my number? January 5, 2016 by Sandra
Tuesday, January 5, 2016 by sandra

math
A rectangular park is 35m long and 17wide.a path or width 2.5m constructed on the outside of the park. find the area of path.
Tuesday, January 5, 2016 by Anonymous

Math
please help!! which number is the solution of x/4=-5? a. 20 b. 1.25 c. -1.25 d. -20
Tuesday, January 5, 2016 by hannah

Math
Solve the system using elimination. 10y − 2x = 50 6x − 3y = 12 A. (5, 6) B. (2.1, 0.2) C. (2.1, 4.6) D. (6, 5)
Tuesday, January 5, 2016 by Daniel

Math
Four identical cylindricak tins are tied together bx a rubber band. If r = 14cm, how long is the rubber band?
Tuesday, January 5, 2016 by Christopher

Math (Help) thx!
Solve the system using elimination. 2x − 5y = −5 x + y = 8 A. (−2, 10) B. (5, 3) C. (11, −3) D. no solution
Tuesday, January 5, 2016 by Kaashif

Math
When you solve the system shown by the elimination method, which statement is true? y + 3x = 10 −y − 3x = 10 A. You eliminate y; the sum of the coefficients of y is zero. Then, you can solve for x. B. There is no solution; x and y are eliminated and you get the ...
Tuesday, January 5, 2016 by Albert

Math
Tom has green and red tomatoes in a bag a 4 to 3 ratio 5 green tomatoes and 5 red tomatoes were removed making the ratio become 3 to 2 how many red tomatoes were originally in the bag Please show me how to work the problem
Tuesday, January 5, 2016 by Michelle

math
after spending 80% of her money Lei has P100.00 left. How much was her money before
Tuesday, January 5, 2016 by sarah

math
A car of mass 1.2tonnes is travelling up a slope of 1 in 150 at a constant speed of 10m/s. if the frictional and air resistances are 100 newton , calculate the power exerted by the engine. the car descends the same slope working at a rate of 2kw what will be its acceleration ...
Tuesday, January 5, 2016 by asad

math
The 5th terms of G.P is 4375 and 2nd term is 35 find ?
Tuesday, January 5, 2016 by A.P and G.P

Math
f(x) is a polynomial equation. If you divide f(x) by 2x+1, the remainder is 4 and when we call dividend q(x), q(x) is multiple of x-1. What is g(1) if g(x) is the dividend of (x^2+x+1)f(x) divided by x+(1/2)?
Tuesday, January 5, 2016 by Younggee

Math
The ratio of David's age to Michael's age is 5:8, and the ratio of Michael's age to Sarah's age is 7:3. If the sum of their age is 115, how old is each person?
Tuesday, January 5, 2016 by Anonymous

Math
Solve the system using substitution. 6x + y = 12 4x + 6y = −8 A. (2 1/2,3) B. (−2 1/2,−3) C. (2 1/2,−3) D. no solution I GOT B!
Tuesday, January 5, 2016 by Albert

Math
Solve the system using substitution. x = y − 6 y = 6 − 3x A. (0, 6) B. (6, 0) C. (0, −6) D. (−6, 0)
Tuesday, January 5, 2016 by Albert

Math
Solve the system using substitution. y = 4x − 5 y = 2x + 1 A. (−2, −3) B. (1, 3) C. (−2, −13) D. (3, 7)
Tuesday, January 5, 2016 by Albert

Math 11
How do you figure out the corresponding reciprocal function.
Tuesday, January 5, 2016 by Halima

MATH help ty
Solve the system using substitution. y = 4x − 5 y = 2x + 1 A. (−2, −3) B. (1, 3) C. (−2, −13) D. (3, 7)
Tuesday, January 5, 2016 by Gopi

Math (Help) thx!
Solve the system using elimination. −7x + 15y = 95 7x − 15y = 115 A. (7,935) B. (935,7) C. (15,1313) D. no solution
Tuesday, January 5, 2016 by Gopi

Math
Estimate the quotient, using two set of compatible numbers
Monday, January 4, 2016 by Angela

math
a boy runs 18.4 miles in 4.5 hours, how many miles can he run in 1 hour?
Monday, January 4, 2016 by Robert

Math
One car is 3.9 meters long the other is 6%shorter How long is second car? What is the formula I use for questions involving %
Monday, January 4, 2016 by Nancy

math
What is the are of 18ft 18ft 4ft 3ft 3ft
Monday, January 4, 2016 by Daniel

math
where Amanda lives the sales tax is 7%. Amanda paid $35 in sales tax on a new stereo. what was the price of the stereo?
Monday, January 4, 2016 by hannah

Math
Shannon bought 9 pounds of almonds for a total cost of $27. The cost per pound of cashews is 70% more than the cost of almonds. Shannon bought enough cashews that when she mixed them with the almonds the cost was $4.00 per pound. What percent of the mixture by weight was ...
Monday, January 4, 2016 by Brittany

math
estimate each quotient 461 divided by 9
Monday, January 4, 2016 by evan

Math
What's 4x to the second power + 12x +8 factored?
Monday, January 4, 2016 by Vanessa

Math
Find each unit rate Julio walks 3 1/2miles in 1 1/4hours
Monday, January 4, 2016 by Christy

Math
I can invest money at 5.75% per annum. How much should I invest now to ensure that I have $5000 after 1 year?
Monday, January 4, 2016 by Anonymous

Math
What is the unite rate of 1 slice of beaf party
Monday, January 4, 2016 by Idiatou

Math
The science test grades are posted. All students taking the test scored over 75. Unfortunately, 4 students were absent for the test and the computer listed their scores as 0 until the test is taken. Assuming that no score repeated more times than the 0's, what measure of ...
Monday, January 4, 2016 by Vstar

Math
How do i figure out the weight of the quantity if 3% of the full weight is 43 grams?
Monday, January 4, 2016 by Anonymous

Math
Vanessa has taken 4 quizzes so far and her average score so far is an 88. If she gets a 100, a perfect score on the remaining two quizzes, what will her new average be?
Monday, January 4, 2016 by Vstar

math
Suzy was putting a stone boarder around her square garden.she las able to complete one side of her garden before she ran out of stones.she usted 9 sones for the first side.How many more stones will she buy to complete her stone boarder?
Monday, January 4, 2016 by johny

Math -Algebra
write equation of given translation of y=|x| 1 unit down 5 units 10 units left 4 units up 6 units left
Monday, January 4, 2016 by Jack

math
7x-3y=41 2x=-5y Solve using augmented matrix What do i do?
Monday, January 4, 2016 by Andrew

Math
A group of 21 people have enough food for 24 days. If 15 additional people join them, they would have enough food for only___days. (Assume everyone eats the same amount of food each day)
Monday, January 4, 2016 by Sally

math
Abel Save a 43 more nickels than dimes. After he spents 17 dimes, he had twice as many nickel than dimes . How many coins did he have left ? Is the below answer is correct because in question he is saying twice as many nickel than dimes number of dimes --- x number of nickels...
Monday, January 4, 2016 by Gayatri

Math
In a school orchestra, 2/5 of the students are string players. Of the string players, 5/8 are girls. What fraction of all the students in the orchestra are girls who play string instruments.
Monday, January 4, 2016 by Jaden

math
Maria plans to fill the pots in her garden with soil and plant food. Maria has 8 1/4 quarts of soil and 1 1/2 quarts of plant food. Part A Each pot requires 3/4 quart of soil. For how many pots does Maria have enough soil? Show your work. Answer : 11pots Part B Each pot ...
Monday, January 4, 2016 by Sai

Math
What is {23%,0.21,1/4,1/5} from least to greatest I need the answer today please thank you
Monday, January 4, 2016 by Nick

Math
There are 14 children in little league baseball team. Only 9 can play at a time. The baseball season has 42 games. The coach decided that each of the 14 children would play in the same number of complete games.In how many complete games will Howard, one of the 14 children, play?
Monday, January 4, 2016 by JIm

math
Ronnie is thinking of a number. He says that he gets the same result when he multiplies his number by 2 as when he adds 5 to his number. What is the number?
Monday, January 4, 2016 by Heather

Math
Solve. 24 - (8 ÷ 2) + 6 =
Monday, January 4, 2016 by Daisy205

Math
y=arccos(sin(x)), find dy/dx. I got -1, is this correct? When I tried to check on wolfram alpha I didn't get this right.
Monday, January 4, 2016 by Beth

math
The Johnson family has been very busy and has not done their laundry for several weeks.The dirty laundry pile consists of 540 item of clothing.They figure they can put on average of 27 pieces of clothing in a single load.How many loads of laundry will the Johnson family have ...
Monday, January 4, 2016 by Anonymous

Math Complicated
Please I am desperate need of help for this symbol. What does the long square root sign mean? Like in √5 + 8 +24 = √37 The square root sign is supposed to go above 5, 8 and 24. What does that mean? Like find the square root of each number? Or…please I need ...
Monday, January 4, 2016 by Lucia Vendales

Math
Simplify the following expression:(6 x^4)(4 y^2) / [ (3 x^2)(16 y) ] Please help, I don't get this!
Monday, January 4, 2016 by Katlyn Winchester

Math
Which equivalent fraction would you have use in order to make 3/5 to 21/25?? Plz have an explanation of how you solved the answer and not just one sentence. Thank you!!
Monday, January 4, 2016 by Jessica

Math
3(y+2) for y = 3
Monday, January 4, 2016 by hannah

Math! Pls Help!
A store is having a 10%-off sale. It gives an additional 10% off if the price is still over $100 after the first discount. A jacket costs $199.99. Will you get the second discount and if so, how many dollars will you save in total? a. yes; $12.49 b. yes; $38.00 c. no d. yes; $...
Monday, January 4, 2016 by Talia

math
Find two mixed numbers that up to 16 but have a difference of 5???
Monday, January 4, 2016 by miranda

Math
Abel Save a 43 more nickels than dimes. After he spents 17 dimes, he had twice as many nickel than dimes . How many coins did he have left ? not like this answer below need the chart model : number of dimes --- x number of nickels -- x+43 he spends 17 dimes, so he has x-17 ...
Monday, January 4, 2016 by Gayarhri

Math
find two mixed numbers so that the sum is 16 and the difference is 15. find three mixed numbers so that the least number is 5 1/5.
Monday, January 4, 2016 by Vee

Math
Identify the sequence... 3,888, 216, 12, 2/3... a. arithmetic b. geometric c. neither d. both Is it c or d?
Monday, January 4, 2016 by Juno

Math
y=arccos(sin(x)), find dy/dx and sketch it's graph(I guess I can do this on wolframalpha after I'm done solving the question). And by arcsin I mean inverse of the expression(written like cos^-1(sin(x)), but is not 1/cos(sinx) but the inverse of cos). I am not getting ...
Monday, January 4, 2016 by Beth

math
Use any method to add or subtract. 5/7 - (3/14 + 3/14)
Monday, January 4, 2016 by christopher

Math
Dixon and his little sister Ariadne stand next to each other on the playground on a sunny afternoon. Their mother measures their shadows. Dixon's shadow is 18 feet long and Ariadne's shadow is 15 feet long. If Dixon is 6 feet tall, how tall is Ariadne?
Monday, January 4, 2016 by Claire

Math
there were 50 student in the Chess Club the membership went up buy 10% how many more student joined the the club?
Monday, January 4, 2016 by Printia

math
Assume that all chickens have 3290 feathers. If it takes you 2.6 seconds to pluck 83.6 feathers, how many hours would it take you to defeather 7256 chickens? Answer in units of hours.
Monday, January 4, 2016 by Amy

Math
You are ordering a meal and have $15 to spend . The restaurant charges 6% sales tax. You plan to leave a 15% tip . The equation C = x + 0.06x + 0.15x gives the total cost C of your meal , where x is the cost before tax and tip . What is the maximum amount you can spend before ...
Monday, January 4, 2016 by Gary

math
7 1/4- 2 4/5 =
Monday, January 4, 2016 by Anonymous

Math
The length of rectangle is twice its width,and its perimetet is 90. What is its area?
Monday, January 4, 2016 by Akemi

math
m - 7 <6 m < -1 *** m > 1 m < 13 m < -13 please check my answer!!!!!!
Monday, January 4, 2016 by lilly

math
Abel Save a 43 more nickels than dimes. After he spents 17 dimes, he had twice as many nickel than dimes . How many coins did he have left ?
Monday, January 4, 2016 by Gayarhri

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