3 years ago

12x + 7 < -11 AND 5x – 8 > 40

1 answer:

8 0

Answer:

$x$ and $x> 9\frac{3}{5}$

Step-by-step explanation:

12x+7<-11 subtract 7 from both sides 12x<-18 divide both sides by 12 x<1.5

5x-8>40 add 8 to both sides 5x>48 divide both sides by 5 x>9.6

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We have been given that the standard deviation of a group of 20 scores is 15 and we are asked to find variance.

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