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Rashid [163]
2 years ago
10

What is the repricocal of 2/3 A. -3/2 B. -2/3 C. 1/3 D. 3/2​

Mathematics
2 answers:
Ber [7]2 years ago
6 0
The reciprocal of 2/3 would be 3/2 or D, you just flip the denominator and numerator
Ksju [112]2 years ago
4 0
The answer is -3/2 .....
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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]

the parabola has maximum at 9, meaning is a vertical parabola and it opens downwards.

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


\bf \textit{we also know that } \begin{cases} x=-7\\ y=1 \end{cases}\implies 1=a(-7+5)^2+9 \\\\\\ -8=a(-2)^2\implies -8=4a\implies \cfrac{-8}{4}=a\implies -2=a \\\\[-0.35em] ~\dotfill\\\\ ~\hfill y=-2(x+5)^2+9~\hfill

7 0
3 years ago
PLEASE help!!!!!! You can get 50 points and a brainliest if you help me.
timofeeve [1]
It is D, because looking at a unit circle, 5pi/3 is about the same location as -sqrt3 which is approximately 1.4.
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3 years ago
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Lady bird [3.3K]

Answer:

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A truck driver drives at a constant rate of 60 miles per hour while on the highway. Which equation represents the distance, d, i
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B

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