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Alexeev081 [22]
3 years ago
5

using three data points (x,y) that we know Evil passed through and the general quadratic equation, create three corresponding eq

uations:
Mathematics
1 answer:
Katen [24]3 years ago
7 0
The general quadratic equation is y = ax^2 + bx + c.

Let's see whether it's possible to invent 3 separate points thru which the graph of a quadratic passes and then to create 3 equations in a, b and c:

Suppose the points are (-3,2), (-1,1) and (2,4).

Focus on (-3,2):  Here x= -3 and y= 2.  Then 2 = a(-3)^2 + b(-3) + c, or
                                                                        2 = 9a - 3b + c

Do the same thing for the other 2 points, (-1,1) and (2,4).

When you're done, you'll have 3 linear equations in the variables a, b and c.

You were not asked to solve for a, b and c.

If you want, however, we could go thru that process.
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Answer:

$25.25-lasagna, $12.25-garlic bread

Step-by-step explanation:

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          -8G=-98

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               G=$12.25

now plug that into G in any of the 2 equations at the top and you can solve for L(price of lasagna)

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Unproportional

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85 -6 = 79

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A salesman keeps 20% of his sales as a commission. How much does he have to sell to earn $1,000? It is percent proportions by th
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Answer: A salesman must sell products for $5000 to earn $1000.
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