Find the slope of the line which is perpendicular to a line having a slope of 5/7

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.

What is the measure of sty in oo below? 130 310 230 50

Alex measured the length of an item to be 3.7 cm. the actual length is 3.5 cm. what is alex’s percent error?