Zach’s car travels 21 miles on 1 gallon of gas. write an equation to represent the relationship between gas

Step-by-step explanation:

Zach’s car travels 21 miles on 1 gallon of gas. .

The equation that represent the relationship between the gas Zach's car uses and the distance he travels can be given as:

Where x is the number of gallons used and D is the total distance covered in x gallons.

walter needs to make at least 5 more cookies but no more than 40. 5 ≤ x ≤ 40

step-by-step explanation:

20 ≤ x + 15 ≤ 55

subtract 15 from all parts

20-15 ≤ x + 15-15 ≤ 55-15

5 ≤ x ≤ 40

this means how many more cookies he has to make

walter needs to make at least 5 more cookies, but no more than 40 cookies; 5 ≤ x ≤ 40