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2 years ago

Pls helphelpepelsjjejdkdkdjf

Mathematics

2 answers:

Yuki888 [10]2 years ago

8 0

Answer:

bbb

Step-by-step explanation:

jonny [76]2 years ago

5 0

I think runner d have a great day

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Determine whether the triangles are similar. If so, name the postulate or theorem you used.

Mice21 [21]

Answer:

Yes, AA~

Step-by-step explanation:

because 2 of the angles are the same (90 and 52) they have to be the same. The triangle on the right is known to be 90 degrees because 52+38 is 90 and 180-90 is 90 and a triangle has to add up to 180 degrees

5 0

2 years ago

1. The national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15. The dean of a college wants to kno

Nat2105 [25]

Answer:

We conclude that the mean IQ of her students is different from the national average.

Step-by-step explanation:

We are given that the national mean (μ) IQ score from an IQ test is 100 with a standard deviation (s) of 15.

The dean of a college want to test whether the mean IQ of her students is different from the national average. For this, she administers IQ tests to her 144 students and calculates a mean score of 113

Let, Null Hypothesis, $H_0$ : $\mu$ = 100 {means that the mean IQ of her students is same as of national average}

Alternate Hypothesis, $H_1$ : $\mu\neq$ 100 {means that the mean IQ of her students is different from the national average}

(a) The test statistics that will be used here is One sample z-test statistics;

T.S. = $\frac{Xbar-\mu}{\frac{s}{\sqrt{n} } }$ ~ N(0,1)

where, Xbar = sample mean score = 113

s = population standard deviation = 15

n = sample of students = 144

So, test statistics = $\frac{113-100}{\frac{15}{\sqrt{144} } }$

= 10.4

Now, at 0.05 significance level, the z table gives critical value of 1.96. Since our test statistics is more than the critical value of z which means our test statistics will fall in the rejection region and we have sufficient evidence to reject our null hypothesis.

Therefore, we conclude that the mean IQ of her students is different from the national average.

3 0

3 years ago

A car is moving at a rate of 72 km/hr. How far does the car move when it stops after 4 seconds? anwer is 125m

ludmilkaskok [199]

<h2>REFERS TO THE ATTACHMENT.</h2>

<h2>PLEASE MARK ME AS BRAINLIEST:</h2>

5 0

3 years ago

Amelia receives two dozens roses for her birthday. 18 of the roses are pink what percent of the roses are pink

ollegr [7]

18/24 = pink roses... 75% of the roses are pink.

4 0

3 years ago

2+3+4+5+6+4+2+1+34+4+4+4+4+5

patriot [66]

Answer:

The answer is 82.

Step-by-step explanation:

Just work it through.

7 0

2 years ago