The lowest elevation in Long Beach, California, is 7 ¾ feet below sea level. The elevation of Death Valley is about 40 times lower than the elevation of Long Beach. What is the elevation of Death Valley?

The elevation of Death Valley = 31/160 feet

Step-by-step explanation: Since

The lowest elevation in Long Beach, California, is 7 ¾ feet 

Let say L = 7 ¾ feet 

The elevation of Death Valley is about 40 times lower than the elevation of Long Beach

That is D = 1/40 of L

D = 1/40 × 31/4

D = 31/160 feet

The elevation of Death Valley is 31/160 feet

5y

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