Which variable was used to define the unknown quantity?

x

y

z

You are training for a marathon. On the first three days of training, you run for 2, 4, and 5 miles. How many miles should you run on the fourth day so that you run a mean of 4 miles per day?

Micaela had $22 to spend on seven notebooks. After buying them she had $1. How much did each notebook cost?

2.6 as a repeating decimal into a simplified fraction

Solve this inequality. 8x + 6 < 54 A. x < 6 B. x < 7.5 C. x < 14 D. x < 384

When a certain number is subtracted from 10 and the result is multiplied by 2, the final result is 4. Find the number.

A ball is dropped from a height of 30 feet and each time it hits the ground it bounces 0.75 of the previous height. What is the height of the ball after it makes its third bounce? Round to the nearest hundredth of a foot

Natasha is measuring the angles of a triangle. She measures the first two angles and gets 60° and 80°. What should be the measure of the third angle? A) 10° B) 20° C) 40° D) 220°

Russel and Aaron can build a shed in 8 hours when working together. Aaron works three times as fast as Russel. How long would it take Russel to build the shed if he were to work alone?

The sum of twice a number and 9 is 43

Two thirds of the product of 38 and 16