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Murljashka [212]
3 years ago
10

I need help! I can’t figure out this graph

Mathematics
1 answer:
vladimir2022 [97]3 years ago
7 0

i)

Axis of symmetry:

x = - 2 (the value of x vertex)

ii)

Vertex:

The vertex of a parabola is the point where the parabola crosses its axis of symmetry.

The vertex (-2, -4)

iii)

Domain:

All real number

iv)

Range: y >= - 4 (the vertex is the lowest point on the graph, it has minimum value and opens up)

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"Ryanair charges a mean base fare of $59. In addition, the airline charges for checking in at the airport, carry-on baggage, che
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Answer:

a) P=0.998

b) P=0.879

c) P=0.268

Step-by-step explanation:

The mean charges per passenger are:

\mu=59+39=98

The standard deviation is known to be σ=$25.

If the sample size is 60, we have to calculate:

a) the probability the sample mean will be within $10 of the population mean cost per flight.

This can be calculated from the z-value for a margin or error of 10 from the mean:

z=\dfrac{X-\mu}{\sigma/\sqrt{n}}=\dfrac{10}{25/\sqrt{60}}=\dfrac{10}{3.2275}=3.1

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b) the probability the sample mean will be within $5 of the population mean cost per flight.

This can be calculated from the z-value for a margin or error of 5 from the mean:

z=\dfrac{X-\mu}{\sigma/\sqrt{n}}=\dfrac{5}{25/\sqrt{60}}=\dfrac{5}{3.2275}=1.55

P(|X-\mu|

c) the probability the sample mean will exceed $100

Again we will calculate the z-score for X=100.

z=\dfrac{X-\mu}{\sigma/\sqrt{n}}=\dfrac{100-98}{25/\sqrt{60}}=\dfrac{2}{3.2275}=0.62

P(X>100)=P(z>0.62)=0.268

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Answer:

x+2y = 5

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Step-by-step explanation:

solutions of x and y for each system of equation can be solved by graphing

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