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navik [9.2K]
3 years ago
14

If g(x) = -8x+1. Find g(-2).

Mathematics
2 answers:
puteri [66]3 years ago
7 0
-8*-2+1=16+1=17
g(-2)=17
Gala2k [10]3 years ago
4 0
G(-2) = -8(-2)+1
g(-2) = 16+1
g(-2) = 17
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Option D: 4(5+2y)-3(3y+7) is the correct answer.

Explanation:

The expression is $20+8 y-9 y-21$

Solving the expression, we have,

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Now, we need to find an expression equivalent to $20+8 y-9 y-21$

Option A: 2(10+4y-7y-19)

Solving the expression, we have,

$\begin{aligned} 2(10+4 y-7 y-19) &=2(-9-3 y) \\ &=-18 y-6 y \end{aligned}$

From the result, the expression 2(10+4y-7y-19) is not equivalent to $20+8 y-9 y-21$

Option A is not the correct answer.

Option B: $2(10+4 y)-3(3 y-7)$

Solving the expression, we have,

$\begin{aligned} 2(10+4 y)-3(3 y-7) &=20+8 y-9 y+21 \\ &=-y+41 \end{aligned}$

From the result, the expression $2(10+4 y)-3(3 y-7)$ is not equivalent to $20+8 y-9 y-21$

Option B is not the correct answer.

Option C: 4(5+2y-5y-17)

Solving the expression, we have,

$\begin{aligned} 4(5+2 y-5 y-17) &=20+8 y-20 y-68 \\ &=-12 y-48 \end{aligned}$

From the result, the expression 4(5+2y-5y-17) is not equivalent to $20+8 y-9 y-21$

Option C is not the correct answer.

Option D: $4(5+2 y)-3(3 y+7)$

Solving the expression, we have,

$\begin{aligned} 4(5+2 y)-3(3 y+7) &=20+8 y-9 y-21 \\ &=-y-1 \end{aligned}$

From the result, the expression $4(5+2 y)-3(3 y+7)$ is equivalent to $20+8 y-9 y-21$

Option D is not the correct answer.

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