the temperature for the past 8 hours has been changing at the rate of-1.5 degrees each hour. the meteorologist predicts that the temperature will continue changing like this for the next 6 hours. the present reading is 0 degrees a. what was the temperature reading 7 hours ago? b. what temperature is predicted for 6 hours from now? c. when was the temperature reading 6 degrees? d. when is the temperature expected to be -8 degrees?

A. 7 hours ago the temperature was 7 * 1,5 = 10,5 degrees more, so if now it's 0, then it was 10,5 degrees 7 hours ago.

b. in six hours it will be 6 * 1,5 = 9 degrees less, so if it's 0 now, then it will be -9 degrees in 6 hours.

c. the temperature was reading 6 degrees 4 hours ago because:

x * 1.5 = 6           / ÷1.5 (both sides)
x = 4

d. -8 is expected to be in 5 hours and 15 minutes because:

x * 1.5 = 8         / ÷1.5 (both sides)
x = 5 1/3

1. 5/82.95% is better than 7/8

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