Answer:
12
Step-by-step explanation:
AC = BD (as the diagonal of the rectangle)
4x-60=30-x
4x+x = 30+60
5x = 90
x = 90/5
x = 18
=> BD = 30-18 = 12
Answer:
17x+5
Step-by-step explanation:
Simplify the equation
Answer:
They create supplementary angle pairs.
Step-by-step explanation:
Supplementary angles add up to 180°.