Three times a number (n) is 36 less than five times the number (n). What is the number?

18

Step-by-step explanation:    

To find the number, write an algebraic equation with the given information. Let the variable n represent the unknown number.

Now, break it by parts - "three times a number" would be . The "is" means that it equals something, giving us . "36 less than 5 times the number" would be subtracting 36 from whatever 5 times the number is: . So, put it all together and it is .

Next, solve the equation for n. The answer will be the number.

Thus, the number is 18.

- "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."

your answer is

a.

5

step-by-step explanation: