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Serjik [45]
3 years ago
15

To go to dance class at 6:45p.m. bus,Kelly needs 35 minutes to walk home from a friend's house,30 minutes for dinner,and 20 minu

tes to drive to the class. To make class on time,what is the latest time she should leave her friend's house? What is the equation for this problem?
Mathematics
1 answer:
GREYUIT [131]3 years ago
5 0
20+35+30= 1 hr&25 min so she should leave at 5:20
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The bottom answer m y = m h
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A teacher writes an inequality x divided by 6 < -2 on the board. Vincent incorrectly solves the inequality and obtains x <
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The error Vincent made was that he only multiplied the left side of the inequality with 6 although he had to multiply on both sides

Step-by-step explanation:

Given inequality that the teacher wrote is:

\frac{x}{6} -2

Solving an inequality means that the variable should be isolated on left side of the inequality.

So multiplying both sides by 6

6* \frac{2}{6} < -2 * 6\\x < -12

Vincent got the answer is x<-2 = > The error Vincent made was that he only multiplied the left side of the inequality with 6 although he had to multiply on both sides

Keywords: Inequality, solution

Learn more about inequalities at:

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NEED ASAP Triangle XYZ is similar to triangle PDQ. The measures of the angles in triangle XYZ are shown in the table. What is th
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Step-by-step explanation:

as the sum  of measures of triangle =180

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A quality control specialist at a pencil manufacturer pulls a random sample of 45 pencils from the assembly line. The pencils ha
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Answer:

The P-value you would use to test the claim that the population mean of  pencils produced in that factory have a mean length equal to 18.0 cm is 0.00736.

Step-by-step explanation:

We are given that a quality control specialist at a pencil manufacturer pulls a random sample of 45 pencils from the assembly line.

The pencils have a mean length of  17.9 cm. Given that the population standard deviation is 0.25 cm.

Let \mu = <u><em>population mean length of  pencils produced in that factory.</em></u>

So, Null Hypothesis, H_0 : \mu = 18.0 cm     {means that the population mean of  pencils produced in that factory have a mean length equal to 18.0 cm}

Alternate Hypothesis, H_A : \mu\neq 18.0 cm     {means that the population mean of  pencils produced in that factory have a mean length different from 18.0 cm}

The test statistics that will be used here is <u>One-sample z-test</u> statistics because we know about the population standard deviation;

                           T.S.  =  \frac{\bar X-\mu}{\frac{\sigma}{\sqrt{n} } }  ~ N(0,1)

where, \bar X = sample mean length of pencils = 17.9 cm

           \sigma = population standard deviation = 0.25 cm

           n = sample of pencils = 45

So, <u><em>the test statistics</em></u> =  \frac{17.9-18.0}{\frac{0.25}{\sqrt{45} } }  

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The value of z-test statistics is -2.68.

<u>Now, the P-value of the test statistics is given by;</u>

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For the two-tailed test, the P-value is calculated as = 2 \times 0.00368 = 0.00736.

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lol i cant answer that im only in middle schoolStep-by-step explanation:

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