A cable installer charges $45.00 per hour

Mathematics

2 answers:

Anastaziya [24]3 years ago

6 0

Answer:

60.0 + 45.0 x h

Step-by-step explanation:

Leona [35]3 years ago

4 0

Answer:

c(h)=45h+60

Step-by-step explanation:

h= hours worked

b=baseline service charge.

x= hourly fee

c(h)=xh+b

Plug in known values.

c(h)=45h+60

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3 years ago

Suppose a parabola has an axis of symmetry at x=-5, a maximum height of 9, and passes through the point (-7,1). Write the equati

Nutka1998 [239]

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it has a symmetry at x = -5, namely its vertex's x-coordinate is -5.

check the picture below.

so then, we can pretty much tell its vertex is at (-5 , 9), and we also know it passes through (-7, 1)

$\bf ~~~~~~\textit{parabola vertex form} \\\\ \begin{array}{llll} y=a(x- h)^2+ k\qquad \leftarrow \textit{using this one}\\\\ x=a(y- k)^2+ h \end{array} \qquad\qquad vertex~~(\stackrel{}{ h},\stackrel{}{ k}) \\\\[-0.35em] \rule{34em}{0.25pt}\\\\ \begin{cases} h=-5\\ k=9 \end{cases}\implies y=a[x-(-5)]^2+9\implies y=a(x+5)^2+9$

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