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3 years ago

Read the question and type your response in the box provided. Your response will be saved automatically.

Mathematics

2 answers:

Dahasolnce [82]3 years ago

7 0

Answer:

84 is .4 of the trip

40% times 2.5 is 100% (40+40+20)

so, multiple 84 by 2.5 and that's the answer

84 * 2.5= 210

Step-by-step explanation:

sorry for copy write dont report me

rewona [7]3 years ago

5 0

Answer:

84 is .4 of the trip

40% times 2.5 is 100% (40+40+20)

so, multiple 84 by 2.5 and that's the answer

84 * 2.5= 210

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Step-by-step explanation:

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What are the steps to solve for x? x+ax=b

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Answer:

$\displaystyle x = \frac{b}{1 + a}$

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Step-by-step explanation:

Step 1: Define

Identify.

$\displaystyle x + ax = b$

Step 2: Solve for x

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3 years ago

A survey of 100 similar-sized hospitals revealed a mean daily census in the pediatrics service of 27 with a standard deviation o

Vinil7 [7]

Answer:

We conclude that the mean is greater than 25.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 25

Sample mean, $\bar{x}$ = 27

Sample size, n = 100

Alpha, α = 0.05

Sample standard deviation, s = 6.5

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 25\\H_A: \mu> 25$

We use One-tailed(right) z test to perform this hypothesis.

Formula:

$z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$

Putting all the values, we have

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3 years ago

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3 years ago

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2x³-8=0 How do I solve this problem ?

wlad13 [49]

Answer:

$x=2^{\frac{2}{3}}$

Step-by-step explanation:

1) Add 8 to both sides.

$2x^3=8$

2) Divide both sides by 2.

$x^3=\frac{8}{2}$

3) Simplify $\frac{8}{2}$ to 4.

$x^3=4$

4) Take the cube root of both sides.

$x=\sqrt[3]{4}$

5) Rewrite 4 as 2².

$x=\sqrt[3]{2^2}$

6) Use this rule: ${({x}^{a})}^{b}={x}^{ab}$ .

$x=2^{\frac{2}{3}}$

Decimal Form: 1.587401

__________________________________________

Check the answer:

$2x^3-8=0$

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2) Use this rule: $(x^a)^b=x^{ab}$ .

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$2\times2^{\frac{6}{3} } - 8 =0$

4) Simplify 6/3 to 2.

$2\times2^2-8=0$

5) Use Product Rule: $x^ax^b=x^{a+b}$ .

$2^3-8=0$

6) Simplify 2^3 to 8.

8 - 8 = 0

7) Simplify 8 - 8 to 0.

0 = 0

Thank you,

Eddie

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1 year ago