Which of the following has a solution set of {x | x = 0}?
a. (x + 1 < -1) ∩ (x + 1 < 1)
b. (x + 1 ≤ 1) ∩ (x + 1 ≥ 1)
c. (x + 1 < 1) ∩ (x + 1 > 1)

44

step-by-step explanation:

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