Consider the steps to simplify the expression. which property is used to reach step 3? expression: -4 3 7 + 7 + (-3 4 7 ) step 1: = -4 3 7 + (-3 4 7 ) + 7 step 2: = -4 + (- 3 7 ) + (-3) + (- 4 7 ) + 7 step 3: = -4 + (- 3 7 ) + (- 4 7 ) + (-3) + 7 step 4: = -4 + (-1) + (-3) + 7 step 5: = -8 + 7 step 6: = -1 a) the associate property of addition. b) the commutative property of addition. c) the opposite of a sum is the sum of its opposites. d) subtracting a number is the same as adding its inverse.

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Commutative Property of Addition

Step-by-step explanation:

Step 2: -4 + (-37) + (-3) + (-47) + 7

Step 3: -4 + (-37) + (-47) + (-3) + 7

Because the order was changed, it is the Commutative Property.

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base

i think it is 18

step-by-step explanation: