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garik1379 [7]
3 years ago
7

Can someone please help me with this

Mathematics
2 answers:
galben [10]3 years ago
4 0
Yes thats a function, it passes the vertical line test!
svet-max [94.6K]3 years ago
4 0

Answer:

Yes it is a function

Step-by-step explanation:

If it passes the vertical & horizontal line test, then it is a one to one. if it passes the vertical line test but fails the horizontal, then it is a function, but not one to one.

Hoped this helped you!

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10- -7 = 10 + 7 = 17!
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A study claims that college students spend an average of 4 hours or less studying per day. A researcher wants to check if this c
kirill115 [55]
<h2>Answer with explanation:</h2>

Let \mu be the population mean.

By observing the given information, we have :-

H_0:\mu\leq4\\\\H_a:\mu>4

Since the alternative hypotheses is left tailed so the test is a right-tailed test.

We assume that the time spend by students per day is normally distributed.

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Standard deviation : \sigma=1.2

Test statistic for population mean :-

z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}

\Rightarrow\ z=\dfrac{3.15-4}{\dfrac{1.2}{\sqrt{121}}}\\\\\Rightarrow\ z=-7.79166666667\approx-7.79

Critical value (one-tailed) corresponds to the given significance level :-

z_{\alpha}=z_{0.1}=1.2816

Since the observed value of z (-7.79) is less than the critical value (1.2816) , so we do not reject the null hypothesis.

Hence, we conclude that we have enough evidence to accept that the college students spend an average of 4 hours or less studying per day.

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3 years ago
In the square pyramid shown below, the area of each triangle is 135 square meters and the area of the base is 324 square meters.
stepan [7]
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Height of Pyramid = H

By Pythagoras' Theorem:

15² = H² + 9²

225 =H² + 81

 H² + 81 = 225

H²  = 225 - 81

H²  = 144          Take square root of both sides

H  = √144

H = 12

Height = 12 meters.

Option C.
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Is (8+√2)(8-√2) Rational or irrational no need to explain why
MA_775_DIABLO [31]

Irrational

==========%%%%%%%%++++++++

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