Benjamin is riding a unicycle. the tire of his unicycle has a circumference of 2.8 m, and the tire revolves 1.5 times per second.
what is the distance benjamin travels in 100 seconds?

The wheel makes 1.5 revolutions per second.
In 100 seconds it will revolve 100 * 1.5 = 15 times (revolutions). Revolutions/sec * sec = revolutions
Each revolution travels 2.8 m.
In 15 revolutions is will travel 2.8 * 15 = 4.2 m. m/revolution * revolutions = m

7 + 28d

Step-by-step explanation:

-7(-1 - 4d) [ -7 gets multiplied with -1 and-4d when brackets open ]

= -7 × (-1) -7 × (-4d)

= 7 + 28d (Ans)