The answer is 4.
The reason is that 5 times 4 is 20.
U call it keep change change. keep 15.7. change it to subtract and change -3.45 to just 3.45 (positive not negative)

The Correct choice is B. Vertical
<u>V</u><u>ertical</u> Angles have each of the pairs of opposite angles made by two intersecting lines .
I could help you, but how many paper clips were there? divide 7.20 by whatever number it is...