Mr. carlisle predicted that 10% of the days in august would have temperatures above 100°f. how many days does he predict will have temperatures above 100°f?

Two cyclists 84 miles apart start riding toward each other at the samen time. one cycles 2 times as fast as the other. if they meet 4 hours later what is the speed (in miles) of the faster cyclists

Can someone me out here and the tell me the greatest common factor

Find the center and the radius of the circle with the equation: x^2-2x+y^2+4y+1=0?