Answer:
i think the answer is -7/17
Step-by-step explanation:
hope it help :) i dont really good with fraction
Answer:3, 3
Step-by-step explanation: Urmmm I'm highly d###
and I will only give you the answer
1. A
2. ???
3. disease
4. ???
5. C
6. A
7. D
8. D
9. B
10. A
11. ???
12. A
13. A
14. A
15. A
sorry i don't know 3 of them
Answer:
Marc's age is 12
Step-by-step explanation:
Let
x ----> Marc's age
y ---> Tony's age
z ---> Ben's age
we know that
the sum of their ages is 40
so
-----> equation A
Marc is half as old as Tony
so
----> equation B
Marc is three times as old as Ben
so
![x=3z](https://tex.z-dn.net/?f=x%3D3z)
----> equation C
substitute equation B and equation C in equation A
![x+2x+\frac{x}{3}=40](https://tex.z-dn.net/?f=x%2B2x%2B%5Cfrac%7Bx%7D%7B3%7D%3D40)
solve for x
![\frac{10x}{3}=40](https://tex.z-dn.net/?f=%5Cfrac%7B10x%7D%7B3%7D%3D40)
![x=40(3)/10\\x=12\ years](https://tex.z-dn.net/?f=x%3D40%283%29%2F10%5C%5Cx%3D12%5C%20years)
therefore
Marc's age is 12