Solve the equation. Then check your solution.

Option B: 21 is the solution

Explanation:

Given that the equation is

We need to determine the solution of the equation.

The solution can be determined by solving the equation for v.

Hence, to determine the value of v, let us multiply both sides of the equation by 7.

Thus, we have,

Simplifying the terms, we get,

Thus, the solution of the equation is 21.

Therefore, Option B is the correct answer.

she will most likely have 33  

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."