Respuesta :

MathGeek289
So, We Need To Write An Equation To Find This:

AD = lAl + lDl

So:
AD = l-7l + l8l
l-7l= 7.

AD = 7 + 8

7+8 = 15

AD = 15

So, AD = 15. This Means That The Answer Is B.
dasetka
You can find the length of AD by finding the difference between the two points. This means subtracting the number under A from the number under D.

D - A
8 - (-7)   You can cancel out the double negative
8 + 7      And Add
15

So, the length of AD is B. 15 .