BRAINLIEST AND 80 POINTS IF ALL ARE ANSWERED1 For each systems of equations below, choose the best method for solving and solve. Show your work.
a. 3x+y=24 ; -x-y=-10
b. y=-x-6 ; 3y=-18
c. y=-2x+17 ; y=8-x
d. y=x-7 ; y=x+7
e. y+2x=2 ; y=-4x+10
f. x+2y=-4 ; -4x-3y=16

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

Maria heard on the radio that the high temperature that day would be to determine the temperature in degrees celsius, she used the formula , where c is the temperature in degrees celsius and f is the temperature in degrees fahrenheit.

There are a total sales of 2,000 dollars on monday on tuesday sales dropped 10% on wednesday sales dropped another 20% compared with tuesday from wednesday to thursday sales increases by an equal amount to 25% of monday total sales what is the net change in dollars on total sales from monday to tuesday