A fish swims at 10 ft below sea level , and then swims another 10 ft deeper to avoid a shark. Write an addition expression that represents this situation

PLEASE ANSWER I NEED IT FOR TODAY!

0+(-10+-10) i don't know if this is what you need..sry if it's not

Step-by-step explanation:

true statements:

a) x + y = y + x   ⇒ commutative property of addition

b) (x * y) * z = x * (y * z) ⇒ associative property of multiplication

d) (x + y) + z = x + (y + z) ⇒ associative property of addition

false statements:

c) x - y = y - x   should be: x - y = - y + x

e) (x - y) - z = x - (y - z) should be: (x - y) - z = x - (y + z)

step-by-step explanation:

answer: 12

step-by-step explanation:

because yes