Question

The temperature decreased overnight by 15.2°C to a temperature of –12.8°C. Suppose t represents the temperature before it decreased.

Which equation can be used to represent this situation?









A.

t – 15.2 = –12.8








B.

t + 12.8 = –15.2








C.

t – 12.8 = 15.2








D.

t – (–15.2) = –12.8

Answer 1

't' is the temperature before it decreased.

The temperature decreases by 15.2, so we subtract 15.2.

The result after we subtract is -12.8, so that's what it equals.

So we have:

t - 15.2 = -12.8