Question

During a period of extreme cold, the average daily temperature dropped decreased by 112°F day. How many days did it take for the temperature to decrease by 9°F? Which equation would you use to find the solution?

A x + 112 = 9x + 112 = 9

B x − 112 =−9x − 112 =−9

C −112x = −9−112x = −9

D 112x = 9

Answers

  1. It takes about 4 days for the temperature to decrease by 9°F.
    An equation is an expression that shows the relationship between two or more variables or numbers.
    Let x represent the number of days. Given that the temperature drop decreased by 1 1/2°F each day (- 1 1/2), for it to decrease by 9°F (-9):
    -1 1/2 * x = -9
    -1.5x = – 9
    x = 4 days
    It takes about 4 days for the temperature to decrease by 9°F.

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