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OLEGan [10]
2 years ago
11

If f(x) = -2x + 4, what is f(-3)?

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

Answer:

10

Step-by-step explanation:

Hello!

To solve this, we can plug in -3 for x in the equation -2x + 4.

Evaluate:

  • f(x) = -2x + 4
  • f(-3) = -2(-3) + 4
  • f(-3) = 6 + 4
  • f(-3) = 10

The value of f(-3) is 10.

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At a certain university, the average attendance at basketball games has been 3125. Due to the dismal showing of the team this ye
Neporo4naja [7]

Answer:

The test statistic needed to evaluate the claim is t = -1.08.

Step-by-step explanation:

The test statistic is:

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

In which X is the sample mean, \mu is the expected value of the mean, s is the standard deviation of the sample and n is the size of the sample.

At a certain university, the average attendance at basketball games has been 3125. The athletic director claims that the attendance is the same as last year.

This means that \mu = 3125

Due to the dismal showing of the team this year, the attendance for the first 9 games has averaged only 2915 with a standard deviation of 585.

This means that n = 9, X = 2915, s = 585

What is the test statistic needed to evaluate the claim?

t = \frac{X - \mu}{\frac{s}{\sqrt{n}}}

t = \frac{2915 - 3125}{\frac{585}{\sqrt{9}}}

t = -1.08

The test statistic needed to evaluate the claim is t = -1.08.

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