Answer:
m∠A = 144°, m∠B = 36°
Step-by-step explanation:
Supplementary angles are angles that add up to 180 degrees.
Substitute 4(m∠B) for m∠A.
4(m∠B) + m∠B = 180
5(m∠B) = 180
<u>m∠B = 36°</u>
Substitute 36 for m∠B.
4(36) = m∠A
<u>m∠A = 144°</u>
Option D!
10x+6
the area of a rectangle is (length+height)*2
so you have to add two representations of the length and height and then multiply it by 2
I don't know what this is but for some reason its funny
