89 km would be about 55.3 miles! that's the best answer, but if they want you to round then I'd say choose 55 miles
The answer is a) 12m^3 + 10n^2
Here's a graph of those terms.
Answer:
3(x + 4) = 3(x) + 3(4)
3(x + 4) = 3x + 12
3x + 12 = 3x + 12
Subtract 12 from both sides
3x + 12 - 12 = 3x + 12 - 12
3x = 3x
3x - 3x = 3x - 3x
= 0
