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vredina [299]
3 years ago
11

Which expression is equivalent to 3(1 + x) + 7? Ax+-7 B) X + 10C)3×+7D)3×+10​

Mathematics
2 answers:
son4ous [18]3 years ago
7 0

Answer:

D) 3x+10

Step-by-step explanation:

3(1 + x) + 7 \\  = 3 + 3x + 7 \\  =3x + 10

AlladinOne [14]3 years ago
6 0

Answer: D

Step-by-step explanation:

3(1+x)+7 = 3+3x+7 =3x+10

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so hmmm on average on the last 7 test, you get 82, so hmmm we could say that on each of the 7 tests you got 82, so you got 82, 7 times.

now, let's say in the 8th test, you get a grade of "g", now, if we were to get an average of all 8 tests, that means the average will simply be (82*7) + "g", and we know that's 84, so

\cfrac{(\stackrel{\textit{sum of all first seven tests}}{82+82+82+82+82+82+82})~~ + ~~g}{8}~~ = ~~84\implies \cfrac{(82\cdot 7)~~ + ~~g}{8}~~ = ~~84 \\\\\\ \cfrac{574+g}{8}=84\implies 574+g=672\implies g=672-574\implies g=98

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Step-by-step explanation:


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3 years ago
6ε−2(7+3ε)&gt;5(2ε−3)−ε<br> solve the inequality
monitta

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Step-by-step explanation:

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