How do I explain percentages to a young person

My friend joop got 14 totts and elentines for about $72. Totts for $8 each and some elentines for $3 each. Write a system of equations to model the relationship between Joop's totts (x) and elentines (y).

Consider the diagram below of a basketball fitting perfectly into the box it comes in. The volume of the ball is approximately 523.3 cubic inches. Find the height of the box to the nearest inch. Use 3.14 for pi.

How many real solutions does the equation: x2-7x+10=0 have?

Enter the value of the 8 in the following number. 438.13

On Sunday, a local hamburger shop sold a combined total of 261 hamburgers and cheeseburgers. The number of cheeseburgers sold was two times the number of hamburgers sold. How many hamburgers were sold on Sunday?

Part A: Create a system of linear equations with no solution. In two or more complete sentences, explain the specific characteristics that you included in each equation to ensure that the system would not have a solution.

Seven more than the quotient of a number and 5 is equal 2

Use the rules of equations and inverse operations to solve the equation. -x3=216 6 -6 ±6 -6square6

3 over 5 minus (negative 3 over 4) its a fraction

You were billed $28.50 $28.50 for additional data usage on your cell phone at a rate of $9 $9 per gigabyte. Three choices are correct ways to calculate the additional gigabytes, g g, that you used. Which choice is NOT?