Question

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.

(a) Write down the formula to calculate the distance he runs in the n-th week .

(b) Use the formula to calculate the distance he runs in the 12 week of training.​

Answer 1

a) 40 + 10d where is the distance

b) 160 km

Explanation:

→ Substitute 12 into the formula

40 + ( 10 × 12 ) = 160