Sabena had a sum of money. she spend $10 on a textbook and used half of the remaining money to buy some fruit. she then bought a meal that cost $5 and was left with $8. how much money did sabena have at first? explain

answer: the correct one is a

step-by-step explanation:

l.ln.lln.k.nkl

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."