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liq [111]
2 years ago
11

-3x+7=28 what am i supposed to do once i get it to be -3x=21

Mathematics
1 answer:
Brums [2.3K]2 years ago
4 0

Answer:

You would divide by -3, in this case x would be -7

Step-by-step explanation:

-3/-3 = x -3/21 = -7

x=-7

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a drop in temperature means the temperature will decrease.

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3 years ago
What two numbers multiply to 4 and add up to -21?
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-5.25? Maybe

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A standardized​ exam's scores are normally distributed. In a recent​ year, the mean test score was 1491 and the standard deviati
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Answer:

z(1910)=1.3429\\\\z(1230)=-0.9006\\\\z(2190)=2.2404\\\\z(1380)=-0.3558

Step-by-step explanation:

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#The z-score for 2190 is calculated as follows:

z(2190)=\frac{x-\mu}{\sigma}\\\\=\frac{2190-1491}{312}\\\\=\frac{699}{312}\\\\=2.2404

#The z-score for 1380 is calculated as:

z(1380)=\frac{x-\mu}{\sigma}\\\\=\frac{1380-1491}{312}\\\\=\frac{-111}{312}\\\\=-0.3558

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3 years ago
How much longer is a 1 inch button than 3/8 inch button
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