Answer:
16.) c. 2x²+7x-15
17.) c. 
18.) D
Step-by-step explanation:
have a wonderful day! :D
19.18/2.8= 6.85 hours or rounded it would be 7 hours
Answer:
5% p.a will rate of interest
So half of Nina's age is 10/2= 5. And since Greg is three years younger we subtract from 5 like so...
10/2=5
5-3
2
So Greg is 2 years old. I hope this helps love! :)