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4 years ago

Solve the inequality -10 is greater or equal to -2x

Mathematics

1 answer:

Vikki [24]4 years ago

8 0

Answer:

-10 and - 2x

The x is unknown number so, we don't know which one if -2x or -10 is greater.

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If it cost $123.76 how much is it if the discount is 17%?

DerKrebs [107]

$102.72 I hope this helps

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4 years ago

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What is 12 divided by 220

DanielleElmas [232]

Answer:

0.0545454545455

Step-by-step explanation:

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4 years ago

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The statewide pass rates for ENGL&101 across Washington state community colleges is 68%. An instructor in the English depart

Mila [183]

Answer:

The calculated value Z=1.2413 < 1.96 at 0.05 level of significance

Null hypothesis is accepted

An instructor in the English department at CBC believes rates at CBC may be equal to the state average

Step-by-step explanation:

Step(i):-

Given Population proportion

P=68%= 0.68

Sample proportion

$p^{-} =\frac{x}{n} = \frac{179}{250} = 0.716$

Null hypothesis : H₀ : p = 0.68

Alternative Hypothesis :H₁ : p > 0.68

Step(ii):-

Test statistic

$Z = \frac{p^{-}-P }{\sqrt{\frac{P Q}{n} } }$

$Z = \frac{0.716-0.68 }{\sqrt{\frac{0.68 X 0.32}{250} } }$

Z = 1.2413

Level of significance

$Z_{0.05} = 1.96$

The calculated value Z=1.2413 < 1.96 at 0.05 level of significance

Null hypothesis is accepted

An instructor in the English department at CBC believes rates at CBC may be equal to the state average

6 0

4 years ago

Which expressions have the same product as 5 * 3/4

Lorico [155]

Answer:

Step-by-step explanation:

Well let's get a couple of equivalents and you can pick the one you like best.

You could have (5 * 3)/4 = 15/4

This 15/4 will give you 3.75

You could have (2*15)/ (2*4) = 30/8 Multiply top and bottom by 2.

30/8 = 3 6/8 = 3 and 3/4

4 0

3 years ago

Suppose that X is a random variable with mean and variance both equal to 20. What can be said about P{0 ≤ X ≤ 40}.

Dennis_Churaev [7]

Answer:

$P(0 \leq X \40) = \frac{19}{20}$

Step-by-step explanation:

We know that:

$P(|X - 20| < 20) + P(|X - 20| \geq 20) = 1$

$P(0 \leq X \leq 40) = P(0-20 \leq X-20 \leq 40-20) = P(-20 \leq X \leq 20) = P(|X - 20| \leq 20)$

$P(|X - 20| \leq 20) = 1 - P(|X - 20| > 20) = 1 - \frac{20}{20^{2}} = \frac{19}{20}$

$P(0 \leq X \40) = \frac{19}{20}$

5 0

3 years ago