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Bogdan [553]
2 years ago
15

Use quadratic regression to find

Mathematics
1 answer:
Rashid [163]2 years ago
8 0

The quadratic equation is given by:

y = 3x² + 10x - 8

The standard equation of a parabola is given by:

y = ax² + bx + c

Where a, b, c are constants

At point (4, 80):

80 = a(4)² + b(4) + c

16a + 4b + c = 80     (1)

At point (-3, -11):

-11 = a(-3)² + b(-3) + c

9a - 3b + c = -11     (2)

At point (-1, -15):

-15 = a(-1)² + b(-1) + c

a - b + c = -15     (3)

Solving equations 1, 2 and 3 simultaneously gives:

a = 3, b = 10, c = -8

Therefore the quadratic equation becomes:

y = 3x² + 10x - 8

Find out more on quadratic equation at: brainly.com/question/1214333

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Danielle earns a 7.25% commission on everything she sells at the electronics store where she works. She also earns a base salary
algol13

Danielle earned $969 last week if she sold $4,400 in electronics merchandise

<h3><u><em>Solution:</em></u></h3>

Given that, Danielle earns a 7.25% commission on everything she sells at the electronics store where she works.  

She also earns a base salary of $650 per week.  

We have to find how much did she earn last week if she sold $4,400 in electronics merchandise?  

Now, we know that, earned amount = base salary + commission

Given that she earns a 7.25% commission on everything she sells

<em><u>So commission earned for selling $ 4400 is given as:</u></em>

commission earned = 7.25 % of 4400

\text { commission earned }=\frac{7.25}{100} \times 4400=7.25 \times 44=319

Earned amount = base salary + commission = 650 + 319 = 969

Hence, she earned $969 last week

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2 years ago
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P=q/2+9
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Step-by-step explanation:

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