Karabo is training by running for the Comrades Marathon, he starts his training by running 40km per week. Each week he increases the distance covered by 10km 1.Write down the formula to calculate the distance he runs in n-th week.​

40 + (n-1)10

Step-by-step explanation:

Correct me if im wrong but im pretty sure this is it.

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have

y -5 = (-1/4)(x + 8)

step-by-step explanation: