80 POINTS Which properties justify the steps taken to solve the system?

{2a+7b=03a−5b=31

Drag the answers into the boxes to match each step.

10a+35b=0; 21a−35b=217
​31a = 217
a = 7
2(7)+7b=0
14 + 7b = 0
7b=−14
b=−2

Hello people, i have a math question that i need with, me, i will give the correct one brainiest, and for the other correct people, a and 5 stars.

The annual snowfall in a town has a mean of 38 inches and a standard deviation of 10 inches. last year there were 63 inches of snow. find the number of standard deviations from the mean that is, rounded to two decimal places. 0.44 standard deviations below the mean 2.50 standard deviations below the mean 0.44 standard deviations above the mean 2.50 standard deviations above the mean

If f(x) = 6x – 4, what is f(x) when x = 8? a2 b16 c44 d52