Question

The temperature falls from 0 degrees to -12 1/4 degrees in 3 1/2 hours. Which expression finds the change in temperature per hour?

Answer 1

The temperature falls from 0 degrees to -12 1/4 degrees in 3 1/2

The expression to find the change in temperature per hour

$\frac{0-(-12 \frac{1}{4})}{3 \frac{1}{2}}$

So, the change in temperature = $\frac{0-(-12 \frac{1}{4})}{3 \frac{1}{2}} = \frac{12 \frac{1}{4}}{3 \frac{1}{2}} = \frac{ \frac{49}{4}}{ \frac{7}{2}} = \frac{49*2}{7*4}= \frac{7}{2}=3.5$ degree/hour

Answer 2

Answer:

-49/4÷7/2

Step-by-step explanation:

To find the expression, first convert the mixed numbers to improper fractions. -12 1/4=-49/4 & 3½=7/2. Hence, we get the expression -49/4÷7/2, which is the answer.

Hope this helps! (I got it right on Edgen.)