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AVprozaik [17]
2 years ago
5

9/10 + 3/100 plz hlp in dire need of answer

Mathematics
1 answer:
Elza [17]2 years ago
8 0

Answer:

I think it's 93/100

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Mashcka [7]

13.

(a)

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(b)

The graph is:

(c)

Using the graph:

\begin{gathered} x=1.8,y=18.6 \\ x=0.548,y=7 \\ x=3.65,y=7 \end{gathered}\begin{gathered} x=1.8 \\ y=-5(1.8)^2+21(1.8)-3=-16.2+37.8-3=18.6 \end{gathered}\begin{gathered} y=7 \\ -5x^2+21x-3=7 \\ -5x^2+21x-10=0 \end{gathered}

Using the quadratic formula:

\begin{gathered} x=\frac{-b\pm\sqrt[]{b^2-4ac}}{2a} \\ x=\frac{-21\pm\sqrt[]{21^2-4(-5)(-10)}}{2(-5)} \\ x=\frac{-21\pm\sqrt[]{241}}{-10} \\ x=0.54758 \\ or \\ x=3.6524 \end{gathered}

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You are paid 82.50 for 71/2 hours of work what is your rate of pay
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Your rate of pay is $11 per hour
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Answer:

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