Why Do we use variables

What is the circumference of the circle? Use 3.14 for $. r = 64 cm

ani spent a total of $7.53 at a store. she bought some cereal for $3.67. she also bought 6 peaches. if each peach cost the same amount which equation can be used to find the cost of each peach, P

25 - (3x + 5) = 2 (x+8) + x how do you do it step by step?

What is 12 divided by 2.59 and 6 divided 1.25?

How do I solve the equation to - 63 + w = 55

An orange is shot up into the air with a catapult. The function h given by h (t) = 15+60t-16t^2 models the orange's height, in feet, t seconds after it was launched select all the true statements about the situation.

Aaron, a car salesman at KIA, makes 4% commission on all sales he sells 5 cars for $15,000 each. What was the total commission on his sales.

What is y + 10 = - 3 (x + 10) in slope-intercept form?

Find the values of x when y = 1 y=x^2 - 2x-3

Five girls share 4 sandwiches equally. What fraction of the sandwich does each girl get?