Answer:
y = 10
Step-by-step explanation:
Unsure of why you've included "plus." -5 + 2y = 15 is an equation in one variable. Adding 5 to both sides results in 2y = 20, so that y = 10. That's it.
50
10% of 100 is 10 so times it by 5
24x^2+112x+120
distribute the 2
(6x+10)(4x+12)
foil it
Answer: 21
I believe that it is 2x^2+1x-2