#1.)Factor 5x + 15

#2.)Factor 4x + 16

1.5(x+3)

2.4(x+4)

Step-by-step explanation:

We are to factorise the given questions...

So let's solve

1.5x+15

Let's look for the figure common to the two,and it is 5

So,5(x+3)

Since we cannot solve further so our final answer is 5(x+3)

2.4x+16

The number common to the two is 4

So let's factorise

4(x+4)

Since it cannot be solved further so the final answer is 4(x+4)

- "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."

1,8,15,22,29,36,43,50

step-by-step explanation: