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ohaa [14]
3 years ago
8

Plz help! free brainlist and points! plz dont send wrong answers or false links solve: 3x +7 =-8

Mathematics
2 answers:
frosja888 [35]3 years ago
8 0

Step-by-step explanation:

3x+7=-8

then collecting like terms

3x=-8-7

3x=-15

x=-5

asambeis [7]3 years ago
5 0

Answer:

-5

Step-by-step explanation:

3x+7=-8

3x+7-7=-8-7

3x=-15

3x/3=-15/3

x= -5

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The correct option is B.

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8 0
3 years ago
Read 2 more answers
Please help me with this question??m
Keith_Richards [23]

Answer:

75

Step-by-step explanation:

f(1) = 7

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

So what you are trying to do here is find the recursive value (that's what it is called) for f(n). Computers love this sort of thing, but we humans have to do it slowly and carefully.

So let's try f(2)

That means that f(2) = 3*f(n-1) + 3

but if f(2) is used it means that you have to know f(2-1) which is just f(1) and we know that.

so f(2) = 3*f(1)+3

f(2) = 3*7 + 3

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Now do it again. We now know F(2), so we should be able to find f(3)

f(3) = 3*f(3 - 1) + 3  

f(3) = 3*f(2) + 3      We know that f(2) = 24

f(3) = 3* 24 + 3

f(3) = 72 + 3

f(3) = 75

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Step-by-step explanation:

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3 years ago
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