If a customer bought an item that had a full price of $775 from a retailer, how much in total will the retailer receive in the end if the customer used a coupon for $125?

a. $775
b. less than $650
c. more than $650 but less than $775
d. $650

x = Original Price = $775

y = Coupon Value = $125 (this is the amount you save)

z = Final Price = x-y = 775 - 125 = 650

- "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."