Which is the best buy? 12 tins of fish at K7.80 or 6 tins of fish at K4.20?
the och price and the initia

12 tins of fish at K7.80

Step-by-step explanation:

The first quote is the best buy.

If we evaluate both quotes we would see that.

For the first one, we have:

12 tins of fish at K7.80

Therefore the cost of one tin would be; K7.80/12= K0.65

For the second;

6 tins of fish at K4.20, one tin cost

K4.20/6=K0.70

So we see we are paying less for the cost of one tin of fish in the first quote.

- "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."

do you have a picture of the table