Nathan biked 54 miles in 4.5 hours what was Nathan average speed in miles per hour what is 54 divided by 4.5

Solve the equation for x.3(6x - 1) = 12 i've tried doing the math and i can't find out what i'm doing wrong

How do i i solve this equation? -18 = x/3 + 3

Afootball is passed through the air and caught at ground level for a touchdown. the height of the ball (h) is given by h= -d² + 12d + 6, where d is the distance in feet the ball travels horizontally. how far from the player passing the ball will the ball be caught? 40 points! will mark brainliest!