Simplify 3(x+2)+5x-7 with steps... I am in 7th grade... Will give the brainliest!

Mathematics

2 answers:

Fynjy0 [20]3 years ago

7 0

Hey there,
3 (x + 2) + 5x - 7
3x + 6 + 5x - 7
3x + 5x + 6 -7
8 x - 1

Hope this helps :))

~Top♥

Virty [35]3 years ago

3 0

First expand the 3(x+2) bracket by multiplying out to give you 3x+6
Now, you have a full expression:
3x+6+5x-7
Collect like terms:
3x+5x=8x
6-7=-1
8x-1 is the answer simplified

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Answer:

(0.102, -0.062)

Step-by-step explanation:

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sample size in 2017 = n2 = 200

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number of people who went for another degree in 2017 = x2 = 46

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p2 = x2/n2 = 0.23

At 95% confidence level, z critical = 1.96

now we have to solve for the confidence interval =

$0.25 -0.23 ± 1.96*\sqrt{((1 - 0.25) * 0.25)/216 + ((1 - 0.23) *0.23/200}$

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There is 95% confidence that there is a difference that lies between - 0.062 and 0.102 on the proportion of students who continued their education in the years, 2017 and 2018.

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3 years ago

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