What is 1/5 as a decimal

Find the slope and the y-intercept if there's one and the equation of the line given these two points( 3, 2) and( 3, -4)

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour. what is the cyclist average rate for the round trip in miles per hour ?

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122