Answer:
a=8:12 c=£1.05:0.70 d=30:50:60:40
b=9:15
Step-by-step explanation:
Answer
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Explanation
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Multiplying the two pieces of the function together:
. This is a quadratic function, and since the coefficient of <em>x</em>² is negative we know it is opening downward and thus has a maximum. We can find the maximum by finding the vertex. First we find the axis of symmetry:
. This tell us there will need to be 3 $5 decreases in price, or a $15 decrease, to maximize the function. $50-$15=$35.
We now plug our 3 in for <em>x</em> in our function:
If they decrease the price their total revenue will be $30,625.
Looking at the function we know that they sell an extra 125 yearbooks for every $5 decrease in price. There were 3 $5 decreases, so 3(125) = 375 extra yearbooks. Add this to the original 500 and we have 375+500=875 yearbooks.
Answer:
Step-by-step explanation:
To find the midpoint, you use the formula .
The points are (-2,-1) and (4,-2).
[add]
[divide]
Now, we know the midpoint is .
Answer:
3,943,000
Step-by-step explanation:
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