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2 years ago

Describe and correct the error in determining wheather (8,11) is a solution of y-x=3

Mathematics

2 answers:

Burka [1]2 years ago

7 0

(8, 11) is the correct solution. x = 8, y = 11

Plug it in:

11-8=3

That's correct.

Harrizon [31]2 years ago

6 0

(8,11) is a solution because if you subsitute y for 11 and x for 8 then you'll 11-8 which does equal 3 so (8,11) is a solution of 3.

y-x=3

11-8=3

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Liam wants to estimate the percentage of people who lease a car. He surveys 240 individuals and finds that 54 lease a car. Find

scoundrel [369]

Answer:

$ME= z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

The confidence interval is 95% and the significance level is $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ and the critical value would be:

$z_{\alpha/2}= 1.96$

And the margin of error would be:

$ME = 1.96 \sqrt{\frac{0.225 (1-0.225)}{240}}= 0.0528$

Step-by-step explanation:

We have the following info given:

$n =240$ the sample size selected

$X=54$ the number of people who lease a car

$\hat p =\frac{54}{240}= 0.225$ the estimated proportion of people who lease a car

The margin of error is given by:

$ME= z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}$

The confidence interval is 95% and the significance level is $\alpha=1-0.95=0.05$ and $\alpha/2 =0.025$ and the critical value would be:

$z_{\alpha/2}= 1.96$

And the margin of error would be:

$ME = 1.96 \sqrt{\frac{0.225 (1-0.225)}{240}}= 0.0528$

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2 years ago

Abby buys 1 sheet of stickers. 5 strips of ten and 9 singles. How many stickers did she buy?

Gala2k [10]

59 stickers on one sheet

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2 years ago

Please help!!!!!!!!!!!!!!!

disa [49]

Answer:

150

Step-by-step explanation:

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3 years ago

Read 2 more answers

HELP ME DO A STATEMENT REASON FOR THIS PLEASE

Natali [406]

Answer:

Lines are parallel if the sum of external angles of same side is 180°.

Step-by-step explanation:

Let one of the external angle is α°.

and other external angle is β° which is equal to α°/11. (∵ Given on is 11 times smaller than the other.)

Also β° = 1/6 of the right angle = (1/6)×90° = 15°.

β° = α°/11 , ⇒ α° = 11×β° = 11×15° = 165°.

α°+β° = 165° + 15° = 180°.

Here, sum of the two external angles = 180° ⇔ the given lines are parallel.

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3 years ago

Danielle’s chemistry professor has a complicated grading system. Each lab counts once and each test counts as two labs. At the e

Murrr4er [49]

Answer:

Step-by-step explanation:

Lab Scores are 84, 81, and 93

Test Scores are 89 and 94

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