Why doesn't matter what letter or symbol is used to find an unknown number

Shayla covered a box with fabric the dimensions of the box are 7 inches 11 inches and 8 inches the fabric costs 7 cents per inch she will only pay for the fabric that covers the box not even if there is extra.

Is - 2 1/4 a rational number

An online store allows sells song downloads for $1.50 each. You have a gift card for $25. Which expression represents the total number of songs you can purchase?

Ben has two boxes. The red box has a volume of 46 cubic feet. The blue box has a height of 3 feet, a length of 7 feet, and a width of 4 feet. How much greater is the blue box than the red box?

A set of four stars form the shape of a rectangle in space. The length of the rectangle is approximately 2,290,000 miles, while the width of the rectangle is approximately 22,700,000 miles. What is the approximate area of the rectangle?

Ella runs a cat rescue center. She started with 2 cats, and her center has an increase of 5 cats per year.

Round 2874992 to nearest 10000

Decide whether a discrete or continuous random variable is the best model for each of the following variables: (a) The time until a projectile returns to earth. (b) The number of times a transistor in a computer memory changes state in one operation.

The rquation of a citcle is x^2+y^2=16 what is the radius of the circle

BETH and Carley are selling candy bars to raise money for new cheer outfits. Beth has sold one less than twice the number of candy bars carely has sold. If they have 188 candy bars in all how many has Beth sold?