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Viefleur [7K]
3 years ago
11

an electrician charges a fee of $50 plus $35 per hour. let y be the cost in dollars of using the electrician for x hours. write

an equation to model this situation
Mathematics
1 answer:
Alex Ar [27]3 years ago
7 0

Answer:

y = 50 + 35x we dont know how many hours they worked

Step-by-step explanation:

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20. A ball is dropped from a height of a little over 5 feet, and the height is measured at small intervals. The table below show
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Step 1:

a) Write the quadratic model

a = -15.64

b = -1.24

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P(t)=-15.64t^2\text{ - 1.24t + 5.2}3

b) t = 0.30

\begin{gathered} P(t)=-15.64t^2\text{ - 1.24t + 5.2}3 \\ =\text{ -15.64 }\times0.3^2\text{ - 1.24}\times\text{ 0.3 + 5.2}3 \\ =\text{ -1.4076 - 0.372 + }5.23 \\ =\text{ 3.45} \end{gathered}

c) t = 0.52 seconds

\begin{gathered} p(t)=-15.64t^2\text{ - 1.23t + 5.23} \\ =\text{ -15.64}\times0.52^2\text{ - 1.23}\times0.52\text{ + 5.23} \\ =\text{ -4.23 - 0.64 + 5.23} \\ =\text{ 0.36} \end{gathered}

d) 0.30 is more likely to be relaible.

e)

\begin{gathered} p(t)\text{ = 1} \\ p(t)=-15.64t^2\text{ - 1.23t + 5.23} \\ 1=-15.64t^2\text{ - 1.23t + 5.23} \\ -15.64t^2\text{ - 1.23t + 4.23 = 0} \\ t\text{ = 0.48222} \\ \text{t = 0.48 seconds} \end{gathered}

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1 year ago
Draw two different shapes with a perimeter of 16 units. What is the area of each shape?
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<u>Shape #2:  A rectangle.</u>
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