Solve each problem below using at least two different approaches. 1. Jenny's great-grandmother is 90 years old. Jenny is 12 years old.

Answer is in the photo. I can't attach it here, but I uploaded it to a file hosting. link below! Good Luck!

is.gd/qKzpBU

dude   i don't even know. i've been trying for hours.

step-by-step explanation:

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."