Comparing Use the estimates to help you choose each correct answer.
14.8(20.7) =
Estimate: 15(20) = 300
1.1(9.8) =
Estimate: 1(10) = 10
72.5(4.9) =
Estimate: 70(5) = 350

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step-by-step explanation:

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

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step-by-step explanation: