Question

Martin runs 100 meters in 15 seconds. What is the equation for d, the distance in meters that Martin covers per second?

Answer 1

The correct answer is C. d × 15 = 100

Martin runs 100 meters in 15 seconds
When we multiply the distance he runs every second by the amount of seconds, the outcome must be 100. Since he runs 15 seconds, we must multiply his distance per second by 15 and the outcome has to be 100.

Else said:
$d \times 15 = 100$

Answer 2

Your answer is C____
Happy early bday