Answer:
The first one I believe
Step-by-step explanation:
I am certain the answer is C. Algebra properties are used in proofs. Postulates are definitely used. And definitions are explanations. So, it is C.
Answer:
15(b)
16(a)
Step-by-step explanation:
15) 2x+10/2
Taking 2 common
2(x+5)/2
x+5
16) -2(-x-3)
(-2*-x)+(-2*-3)
2x+(6)
2x+6
$12.50 because you would divide 50 and 4
Answer:
x=2; the extraneous root x=42.
All the details are in the attached picture, the answer is marked with red colour.
