In a sweet shop you can buy packets of mints for 20p each and bars of chocolate for 30p each. The total cost of m packets for mints and c bars of chocolate is given by the formula T=20m + 30c

Use this formula to calculate the cost if:

m=2 and c=1

m=8 and c=0

If m = 2 and c = 1, then T = 70

If m = 8 and c = 0, then T = 160

Explanation

Multiply 20 by 2 ~ 20 (2) ~ 20m = 40

Multiply 30 by 1 ~ 30 (1) ~ 30c = 30

The sum of the two is 70

T = 70

Multiply 20 by 8 ~ 20 (8) ~ 20m = 160

Multiply 30 by 0 ~ 30 (0) ~ 30c = 0

The sum of the two is 160

T = 160

The first equation answer would be 70, whilst the second equation's answer is 160. I think this would be the correct answer:

20 (2) + 30 (1) = 70.

20 (8) + 30 (0) = 160.

Step-by-step explanation:

Basically, you would do 20 (2) + 30 (1) for one of the equations and 20 (8) + 30 (0) for the other equation. Those equations would give you the answer.