Are these proportional? There are two.

Distance formula:

where d - distance, t - time, s - speed

Let the distance be constant, d = k, then the speed is:

Since the distance is constant, the speed is inversely proportional with time

Let the speed be constant, s = k, then the distance is:

The distance is directly proportional with time

Distance formula:

-d=ts.

where d-distance, time-t, speed-s.

Let the distance be constant, d=k,then the speed is:

-s=k/t.

15

step-by-step explanation:

we are given the following expression and we are to solve it and find the product:

-13 × (-5)

solving the given expression in the standard order of solving a mathematical expression, beginning with the opening of brackets and then multiplying the terms and changing their signs.

-3 × -5 = 15 (answer is positive because when negative is multiplied with negative, it gives a positive answer)

the correct answer is 5 6 and 7