Answer:
60
Step-by-step explanation:
5 ( 9 + d )
Let d=3 and substitute it in
5(9+3)
According to PEMDAS, we do what is in the parentheses first
5(12)
Now we multiply.
60
Answer:
ok
Step-by-step explanation:
can you mark me as brainlist
Answer:
17°
Step-by-step explanation:
∠AOC is a right angle, so it measures 90°
∠AOB and ∠BOC are in ∠AOC, so m∠AOB + m∠BOC = 90
m∠AOB = 73°
m∠BOC = x (shown in the diagram)
73 + x = 90
x = 17
Since angle CDA + angle ABC = 180 then DC is Parallel to AB by transversal of parallel line theorem c-pattern for co-interior angles. to help visualize it draw it