It would be D because when adding them together the only one that makes sense would be D. adding the exponents 5+4 = 9 so it would be 10^9
X + x + x + 20 + 10 = 180
(combine like terms)
3x + 30 = 180
3x=180-30
3x=150
x=150/3
x=50
A-2: Project D.
b: Project A.
Not sure about a-1, hope I helped.
Answer:
the correct answer is b :)))))!!!
