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Amiraneli [1.4K]
3 years ago
13

If f(x)=-8-5x, what is f(-4) (If possible, explain your answer)

Mathematics
1 answer:
timofeeve [1]3 years ago
5 0
<span> f(-4) all you need to do is plug in x = -4 into equation 
so </span><span>If f(x)=-8-5x then
f(-4) = -8 - 5(-4)
f(-4) = -8 + 20
f(-4) = 12

answer
f(-4) = 12</span>
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B.2(2/5x + 2)=4/5x + 4

C.2(2/5x + 4)=4/5x + 2

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Solution:

2(\frac{2}{5}x + 2)

Let us distribute 2 inside the parenthesis.

That is, we use distributive property:

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2(\frac{2}{5}x + 2) =\frac{2*2}{5}x+2*2

So, 2(\frac{2}{5}x + 2) =\frac{4}{5}x+4

Answer:Option (b)

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Applying distributive property, a(b+c)=ab+ac

2(\frac{2}{5}x+4) =2*\frac{2}{5} x+2*4

2(\frac{2}{5}x+4) =\frac{2*2}{5} x+2*4

2(\frac{2}{5}x+4) =\frac{4}{5} x+8

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