using three data points (x,y) that we know Evil passed through and the general quadratic equation, create three corresponding eq
uations:
1 answer:
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:
5L+3G=163
- 4L+4G=150
______________
4(5L+3G=163)
-5(4L+4G=150)
_____________
20L+12G=652
-20L-20G=-750
_____________
-8G=-98
-8G/-8 = -98/-8
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)
Line D and C because they are not parallel but distorted or unsymmetrical
Answer:
Proportional
Unproportional
Step-by-step explanation:
85 -6 = 79
79 -6 = 73
73 -6 = 67
1.49 +10 = 1.59
1.59 + 30 = 1.89
If he wants to earn $1000, it means that $1000 must be 20% of his overall sales.
1000 = 20% * x
1000 = 20/100x
1000 = 0,2x / ÷ 0,2 (both sides)
x = 5000
Answer: A salesman must sell products for $5000 to earn $1000.