Suppose C = 30y + 15 and y = 40x + 25.

Mathematics

1 answer:

Elina [12.6K]2 years ago

5 0

Answer:

C = 1200x + 450

Step-by-step explanation:

C = 30y + 15... (1)

y = 40x + 25... (2)

Substituting y = 40x + 25 in equation (1)

C = 30(40x + 25) + 15

C = 30*40x + 30*15

C = 1200x + 450

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