Between the time Tim woke up and lunchtime, the temperature rose by 8. Then by the time he went to bed, the temperature dropped by 12.
Write an addition expression for the temperature relative to when Tim woke up.

after simplifying it i got: -36.25 as my answer. hope that !

option a is correct.

step-by-step explanation:

scale factor: it is used to find proportional measurements.

proportions means having the same ratio.

scale factor is the ratio of the model measurement to the actual measurement in a simplest form.

or we can say that the ratio of any two corresponding lengths in two similar geometric figures

if the scale factor is more than 1, then it is an enlargement,

if the scale factor less than 1, then it is a reduction.

given the two geometric figure:

by definition of proportions, we have