Can someone answer this? It’s 9th grade algebra

C

Step-by-step explanation:

We want to solve the inequality:

Distribute:

Combine like terms:

We can add 10.2x to both sides:

Subtract 15.3 from both sides:

And divide both sides by 21.42. Hence:

This means all values greater than -2.5. Hence, in interval notation:

In conclusion, our answer is C.

- "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."