Question

Mateo begins his dive at sea level. He dives down 15 meters, and then rises up 4 meters. He dives again, going down 7 meters. Which equation models Mateo’s movements, and uses the commutative property?
A.(–15) + 4 + (–7) = (–7) + (–15) + (–4)
B.(–15) + 4 + (–7) = 7 + 15 + (–4)
C.(–15) + 4 + (–7) = 4 + (–15) + (–7)
D.(–15) + 4 + (–7) = 4 + 15 + 7

Answer 1

Answer:

C.

He dives 15 ( subtract) rises 4 (add) dives 7 (subtract)

-15 + 4 = -11 -7 = -18 meters

Using the second part of c: 4 + (-15) = 4-15 = -11 +(-7) = -11–7 = -18 meters

Answer 2

answer
is D-15
explanation