Equation of line is doubling
Answer:
(a - 4) / (a + 4).
Step-by-step explanation:
(a - 4)/(b + 7) / (a + 4) / (b + 7)
Invert the second fraction and multiply:
= (a - 4)/ (b + 7) * (b + 7) / (a + 4)
= (a - 4) / (a + 4) The (b + 7)'s cancel out.
Answer:
He should consider using an exuberant amount of yarn to raise money for charity. How much yarn is available?
Since a $5 decrease in price increases customers by 20 we can say that we have two points:
(125,100) and (120,120), from these we can find the slope or rate of change of customers as a function of price...
m=20/-5
m=-4
m=-4
c(p)=-4p+b, now we can use (125,100) to solve for b
100=-4(125)+b
100=-500+b
600=b, so our number of customers as a function of price is:
c(p)=600-4p
Revenue will simply be the number of customers times the price charged per customer...or p*c(p):
r(p)=600p-4p^2
We can find price that creates maximum revenue by finding when the derivative is equal to zero...
dr/dp=600-8p
dr/dp=0 only when
0=600-8p
8p=600
p=75
So the price that maximizes revenue is $75.
Answer:
No, it is not a solution
Step-by-step explanation:
Given
Required
Is (4,3) a solution?
(4,3) implies that:
So:
<em>Because 1 and 4 are not equal, then (4,3) is not a solution</em>