Determine the unit rate of a marathon runner who travels 5/2 miles in 1/4 hour

                 (5/2 mile) ÷ (1/4 hour)

             =    (5/2)       x        (4/1)  mph

             =         (20 / 2)  =  10 mph
 

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.