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3 years ago

( 2x + 1°) + ( x - 10°) = 90° Does the equation make sense why or why not ???

Mathematics

1 answer:

Mila [183]3 years ago

5 0

$(2x+1)+(x-10)=90\\\\(2x+x)+(1-10)=90\\\\3x-9=90\ \ \ |+9\\\\3x=99\ \ \ |:3\\\\x=33^o$

Yes. The equation make sense. It's has the solution.

$x=33^o\\\\2x+1=2(33)+1=67^o\\\\x-10=33-10=23^o$

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It takes 1 1/3 hours to set up 1/3 of an hour to run and 2/3 of an hour to verify the results. How many hours will it take to co

liraira [26]

Answer: It will take $\frac{7}{3}$ of an hour to complete the test.

Step-by-step explanation:

We need to convert the mixed number $1\ \frac{1}{3}$ to an improper fraction:

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Now, we need to make the following add the fractions in order to calculate how many hours will it take to complete the test. Then, we get:

$\frac{4}{3}+\frac{1}{3}+\frac{2}{3}=\frac{4+1+2}{3}=\frac{7}{3}$

Therefore, it will take $\frac{7}{3}$ of an hour to complete the test.

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3 years ago

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frez [133]

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3 years ago

What percent is 50% of 50% of x

kiruha [24]

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Step-by-step explanation:

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3 years ago

Complete the proof that angle XYZ is congruent to angle WXY.

aksik [14]

Answer:

Step-by-step explanation:

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4 0

3 years ago

For a sample of n = 36 that has a sample variance of 1,296, what is the estimated standard error for the sample? 6 37 36 6. 9

Liula [17]

The estimated standard error for the sample is 6

Given,

Sample size, n = 36

Sample variance, $s^{2}$ = 1296

Standard deviation, s = √1296

= 36

Standard error, SE = $\frac{s}{\sqrt{n} }$

= $\frac{36}{\sqrt{36} }$

= $\frac{36}{6}$

= 6

Concept

Sample size is the number of participants or observations included in a study. It is denoted by ‘n’

Sample variance is a measure of the degree to which the numbers in a list are spread out. It is denoted by ' $s^{2}$ '

Standard deviation is a measure of how dispersed the data is in relation to the mean. It is denoted by ‘s’

Learn more about standard deviation here:brainly.com/question/13905583

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1 year ago