Question

1. a linear equation describes the temperature decrease in a refrigerator, with t = - 5t + 20, where t is the temperature in °c, and t is time in hours. what is the temperature after 2 hours?

a. 5°c
b. 0°c
c. 10°c
d. 15°c

Explanation:

Step1: Substitute t = 2 into formula

$T=-5\times2 + 20$

Step2: Calculate the result

$T=-10 + 20=10$

Answer:

C. 10°C