D and E. An acute angle is any angle that is less than 90(a right angle). A is an obtuse angle(more than 90). And B + C are right angles. Hope this helps you!
Answer:
um i cannot understand that ok ?
Step-by-step explanation:
Answer:
omg i have that exact same promblem i would say its the frist one but im not 100% sure
Step-by-step explanation:
You'll need to isolate 9a on the left side of this equation
Please add 7 to both sides of the eqn, obtaining 9a = 117.
Solve for a by dividing both sides by 9: a = 117/9 = 13 (answer)