Which expression uses the commutative property of addition and the associative of property multiplication to rewrite the expression (3•2)•5+7? A 7+3•(16)
B 7+3•(2•5)
C (3•2)•5+7
D3•(5•2)+7

i think 1: 2

step-by-step explanation:

4y - 6 + y^2 - 9 = y^2 + 4y - 15

y^2 term

terms

- terms

total of 3 terms when simplified

step-by-step explanation:

answer: two high and two low

step-by-step explanation: because the earth rotates through two tidal “bulges” every lunar day, coastal areas experience every 24 hours and 50 minutes. high tides occur 12 hours and 25 minutes apart.