Write an algebraic expressing for the area of the gymnasium

x(2x + 10)

Step-by-step explanation: To find the area of a rectangle, simply multiple w x l, or width times length. In this case, the length of the gym is x and the width is 2x + 10. Therefore, you get x * 2x + 10, or x(2x+10).

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