Morena, a scuba diver, used the expression below to describe her position in relation to sea level. 0 + (negative 15) + 6

Which statement could describe the diver’s movements?
Morena started at 15 feet below sea level, then dove down 6 more feet.
Morena started at 15 feet above sea level, then dove down 6 more feet.
Morena started at sea level, dove down 15 feet, then dove down 6 more feet.
Morena started at sea level, dove down 15 feet, then rose up 6 feet.

D.

Step-by-step explanation:

Morena started at sea level, dove down 15 feet, then rose up 6 feet.

0 + (-15) + 6 = -19. It is C. She started at sea level, dove down 15 feet, then 6 more feet.

Step-by-step explanation:

Morena dove 19 feet below sea level. That negative sign also means subtracting, so try this! 0 - 15 + 6. This equation makes it more simpler to solve.

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