Simplify. 4x+8/x^2+9x+20 + x+12/x^2+9x+20 A) 1/x+1 B) 5x/x+5 C) 5/x+4 D) 5/x+5

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.

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

3x + 4y = 5 x- 3y = -7 solve by substitution