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inessss [21]
3 years ago
10

A plumber works 80 hours. He charges $60 plus $50 per hour. Which equation shows this situation plz help

Mathematics
1 answer:
Marianna [84]3 years ago
6 0
60+50(80)=Y


Y= Money Made
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Answer:

y=2x^2-4x-8

Step-by-step explanation:

<u>Factored form of a parabola</u>

y=a(x-p)(x-q)

where:

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  • a is some constant.

Given x-intercepts:

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Therefore:

\implies y=a(x-(1+\sqrt{5}))(x-(1-\sqrt{5}))

\implies y=a(x-1-\sqrt{5})(x-1+\sqrt{5})

To find a, substitute the given point (4, 8) into the equation and solve for a:

\implies a(4-1-\sqrt{5})(4-1+\sqrt{5})=8

\implies a(3-\sqrt{5})(3+\sqrt{5})=8

\implies4a=8

\implies a=2

Therefore, the equation of the parabola in factored form is:

\implies y=2(x-1-\sqrt{5})(x-1+\sqrt{5})

Expand so that the equation is in standard form:

\implies y=2(x^2-x+\sqrt{5}x-x+1-\sqrt{5}-\sqrt{5}x+\sqrt{5}-5)

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It is Table A because the points in the graph match with the points which Graph B goes through.

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horrorfan [7]
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In other words, how many ways are there to choose n objects from a total of n objects? Just one; take all of them at the same time.
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