Which of the following is a solution for the inequality

Mathematics

2 answers:

DedPeter [7]3 years ago

4 0

X=5.5 i think is the answer

Liula [17]3 years ago

4 0

Answer:

x = 4

Step-by-step explanation:

Treat the inequality symbol like an equal sign with rules when it comes to dividing and multiplying each side by negatives, however, that rule irrelevant in this case.

Rewrite

2x < 9

Get x alone by dividing by 2

x < 9/2

Simplify into a decimal

x < 4.5

Now that we have that, we must find an answer which is Less than 4.5 because it is not a less than or equal to statement.

x = 4 is the only one which is proven true to this inequality and therefore is our answer

Hope this helps,

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A professor finds that the average SAT score among all students attending his college is 1150 ± 150 (μ ± σ). He polls his class

solniwko [45]

Answer:

Step-by-step explanation

Hello!

Be X: SAT scores of students attending college.

The population mean is μ= 1150 and the standard deviation σ= 150

The teacher takes a sample of 25 students of his class, the resulting sample mean is 1200.

If the professor wants to test if the average SAT score is, as reported, 1150, the statistic hypotheses are:

H₀: μ = 1150

H₁: μ ≠ 1150

α: 0.05

$Z= \frac{X[bar]-Mu}{\frac{Sigma}{\sqrt{n} } } ~~N(0;1)$

$Z_{H_0}= \frac{1200-1150}{\frac{150}{\sqrt{25} } } = 1.67$

The p-value for this test is 0.0949

Since the p-value is greater than the level of significance, the decision is to reject the null hypothesis. Then using a significance level of 5%, there is enough evidence to reject the null hypothesis, then the average SAT score of the college students is not 1150.

I hope it helps!

7 0

3 years ago

One day at lunch , a restaurant served 178 burgers, 63 grilled cheese sandwiches, and 37 salads.

GaryK [48]

178+63+37=278 So if we were ESTIMATING it would be around 280.
I hope that this helps!

5 0

3 years ago

-3 3/7 * 2 1/2 Has o be in simplest form!

OverLord2011 [107]

Answer:

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