Answer:
Step-by-step explanation:
total profit=income -cost
or
P(x)=R(x)-C(x)=-0.5x²+800x-100-(300 x+250)
or P(x)=-0.5x²+800x-100-300x-250
or P(x)=-0.5 x²+500 x-350
so (2)
It is 11 the answer is a that is what i worked out
Answer:
0.9
Step-by-step explanation:
5+2 is 10 and 10*10 is 100 so the answer your looking for is 100
Answer:
In 7 years
Step-by-step explanation:
Let
n ----> the number of years
x -----> Kate's age
y ----> Victor's age
we know that
![(x+n)=2(y+n)](https://tex.z-dn.net/?f=%28x%2Bn%29%3D2%28y%2Bn%29)
we have
![x=17\\y=17-12=5\\](https://tex.z-dn.net/?f=x%3D17%5C%5Cy%3D17-12%3D5%5C%5C)
Victor's age is 5
substitute the given values
![(17+n)=2(5+n)](https://tex.z-dn.net/?f=%2817%2Bn%29%3D2%285%2Bn%29)
Solve for n
![17+n=10+2n](https://tex.z-dn.net/?f=17%2Bn%3D10%2B2n)
![2n-n=17-10](https://tex.z-dn.net/?f=2n-n%3D17-10)
![n=7](https://tex.z-dn.net/?f=n%3D7)
<u><em>Verify</em></u>
In 7 years
Kate's age is 17+7=24
Victor's age is 5+7=12
24=2(12)
so
Kate is twice as old as Victor