Calculate the distance between the points a (-4,2) and b (15,6)

Acount went up from 450 to 600. what was the approximate percent increase?

As a manufacturer of golf equipment, the spalding corporation wants to estimate the proportion of golfers who are left-handed. how many golfers must be surveyed if we want 99% confidence that the sample proportion has a margin of error of 0.025? assume that a previous study suggests that 20% of golfers are left-handed.

Simplify by combining the like terms 3.5y+y+9+1