The radius of the front wheel of Brian's bike is 57cm. Brian goes for a cycle and travels 74.4km.
How many full revolutions did Brian's front wheel complete?

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.

12x+8-x=12x-x+8=11x+8=11