F(×)=-3x+7, what is the value of f(1) f(-8)

Use the substitution method

f(x)= -3x+7

f(1)= -3(1)+7

= -3+7

= -4

f(-8)= -3(8)+7

= -24+7

= -17

Answers :

f(1)= -4 , f(-8)= -17

answer

false

explanation

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answer: x=3 and y=4

step-by-step explanation: