439 Answered Questions for the topic Pre-Algebra

Pre Algebra Prealgebra

02/19/19

Desperate for an answer!!!
Matthew has 9 five dollar bills and ten dollar bills in his wallet. The total amount in his wallet is 60. Write a system of equations to represent this situation. Then solve the system of equations... more
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Pre Algebra

02/13/19

A beach volleyball court is 9 yards wide and 19 yards long. The rope used for the boundary line costs $2.00 per yard. How much would it cost to buy a new boundary line for the court?
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Pre Algebra

02/08/19

In the middle of a park there is a fenced off area, and the shape of the fence is a square. If the area of the fenced off portion is 225 square yards, what is the perimeter of the fence?
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Pre Algebra

02/03/19

solving ssytems of equations
Farmer Brown planted corn and wheat on his 450 acres of land. The cost of planting and harvesting corn​ (which includes​ seed, planting,​ fertilizer, machinery,​ labor, and other​ costs) is $ 270... more
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Pre Algebra

01/29/19

Jonathan pays for his $135 grocery bill with $50 bills. How many bills did he use ?
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Pre Algebra

01/25/19

Water tank problem
There is an empty tank that has a hole in it. Water can enter the tank at the rate of 1 gallon per second. Water leaves the tank through the hole at the rate of 1 gallon per second for each 100... more
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Pre Algebra

01/14/19

Ross dilated the rectangle and the dimensionsof the image were 80 feet by 20 feet. What was the scale factor used? The rectangle is 32 and 8 feet.
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Pre Algebra

01/14/19

Stephanie dilated a rectangle and the dimensions of the image were 24 feet by 6 feet. The original dimensions were 32 and 8. What was the scale factor used?
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Pre Algebra

01/14/19

What will the new dimensions of the rectangle be after a dilation with a scale factor of 7/8?
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Pre Algebra

01/09/19

Math Homework help PLZ
So the question is :The ratio of boys to girls in a middle School soccer program is 8:7 if there are 135 students in the program, how many of them are girls
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Pre Algebra

01/06/19

Write a direct variation equation that relates x inches to y centimeters. 1 inch = 2.54 centimeters
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Pre Algebra

01/04/19

For each word problem, you must show two equations and your work. You may use the substitution or elimination method to solve the equations
Drew has 21 coins, all nickels and quarters, worth 2.85. How many nickels and quarters does Drew have Sally’s $1800 savings is in two accounts. Her total interest for the year was $93 from one... more
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Pre Algebra Math

01/02/19

I’m in 8th grade pre Algebra and I just can’t figure out how to set up this equation. Someone please help!
A commission is a free paid to a salesperson based on a percent of sales. Suppose a salesperson at a jewelry store earns a 6% commission. What commission would be earned for selling a ring that... more
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Pre Algebra

01/01/19

What value of 't' makes the expressions 6t, t+5, and 2t+4 equal?
Why can't I do this?6t = t + 5 = 2t + 46t - t - 5 - 2t - 4 = 03t - 9 = 0t = 3Please explain!However, when I do this, (which I know to be correct) it works:t + 5 = 2t + 4t = 2t - 1-t = -1t = 1IT is... more
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Pre Algebra

12/21/18

A new drug causes the diameter of bacterial cell to show a change in size of −924 micrometers. Which decimal should be used in the research report for this clinical study?
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Pre Algebra

12/15/18

The product of a number a and -10 is at least -40
I need help!!!!!
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Pre Algebra

12/12/18

What is the slope intercept form of (-3,1) and (0,0)?
PLEASE SHOW YOUR WORK!!!!!!!!!!!!!
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Pre Algebra Inequalities

12/11/18

I don't get this question
While shopping online, Jenny orders a CD that costs $14 and a book that costs b dollars. If she spends at least $25 she gets free shipping. Write an inequality for this situation.
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Pre Algebra Algebra

11/29/18

How do you factor 2v^6 - 20v^5 + 50v^4?
Need help on factoring Factoring a product of a quadratic trinomial and a monomial
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Pre Algebra

11/26/18

If Dave’s car gets 18 miles/gallon cost $2.75/gallon then how much will it cost him to make a trip of 450 miles?
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Pre Algebra

11/25/18

I don't understand

A group of 5 friends each have x action figures in their collections. Each friend buys 14 more action figures. Now the 5 friends have a total of 170 action figures. How many action figures did each... more
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Pre Algebra

11/19/18

Find the area of a triangle whose vertices have the coordinates (-1,7), (-1,2), (5,2).
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Pre Algebra Geometry

11/19/18

Pre-Algebra word problem
My daughter recently took a math test and the following question was marked incorrect. Please answer and explain. Thank you.The area of a triangle is 144 square miles. The height is 8 square miles.... more
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Pre Algebra

11/16/18

A frame is 127.5 in wide and 192.1 in tall. If it is reduced to a height of 11.3 in, then how wide will it be?
I don't understand how to do this problem. I am having problems setting up the answer and trying to solve it.
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Pre Algebra Math Algebra 1 Equations

11/16/18

Substitution Method Equation
Can someone please solve this ASAP? Thanks :)(I need a larger and a smaller number)"The sum of two numbers is 45. The larger number is 9 more than the smaller number. What are the numbers?"
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