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3 years ago

HHHHHHEEEEELLLPPP PLLLLZZZ T^T

Mathematics

2 answers:

Lena [83]3 years ago

8 0

Answer:

Here is the Answer

Step-by-step explanation:

The reflection of Point A across the x-axis is (5, –6)

The reflection of Point A across the y-axis is (–5, 6)

The reflection of Figure B across the x-axis is (below)

(–8, –6); (–12, –6); (–11, –10); (–7, –10)

The reflection of Figure A across the y-axis is (below)

(–6, 4); (–9, 1); (–9, 7)

Korvikt [17]3 years ago

5 0

(-6,4) (-9,1) (-9,7)

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3 years ago

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3 years ago

Multiply or divide as indicated 10x^5/2x^2

shepuryov [24]

To perform the following operation, make sure to do the division parts separately and place them back together in the final answer.

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3 years ago

US average math SAT scores follow a normal distribution with a mean of 505 and a standard deviation of 112. A sample of 64 enter

Hitman42 [59]

Answer:

The claim that the scores of UT students are less than the US average is wrong

Step-by-step explanation:

Given : Sample size = 64

Standard deviation = 112

Mean = 505

Average score = 477

To Find : Test the claim that the scores of UT students are less than the US average at the 0.05 level of significance.

Solution:

Sample size = 64

n > 30

So we will use z test

$H_0:\mu \geq 477\\H_a:\mu < 477$

Formula : $z=\frac{x-\mu}{\frac{\sigma}{\sqrt{n}}}$

$z=\frac{505-477}{\frac{112}{\sqrt{64}}}$

$z=2$

Refer the z table for p value

p value = 0.9772

α=0.05

p value > α

So, we accept the null hypothesis

Hence The claim that the scores of UT students are less than the US average is wrong

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