In a local city, the temperature at noon is -3c the temperature is expected to decrease by 2.5c each hour until the temperature reaches -18c how many hours will it take for the temperature to reach-18c?

Writing the equation that governs this situation:

-3C - (2.5C/hr)x = -18C

Simplifying, -3 - 2.5x = -18, or 3 + 2.5x = 18

Combining like terms: 2.5x = 18-3 = 15

Then x = 15/2.5 = 6. The temp. will reach -18C after 6 hours.

han when lo ahe whn hew anh ? ?

explanation:

answer: a) (0,0), (1,1), (2,8), and (3,27).

step-by-step explanation:

0^3=0

1^3=1

2^3=8

3^3=27

in effect, the exponential equation for this would me y=3^x. each x-coordinate cubed is giving the y coordinate, so a is your answer : )