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.

since proposition states that a number is greater than 25, if is true then the number must actually be greater than 25.

this implies that all possible options, except 24, can be accepted

each side has a different length.  

step-by-step explanation: