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3 years ago

1. Find the error and correct each problem: Jasmine wrote 100 - 10(4 + 2f) = 100 - 40 + 20f *

1 answer:

8 0

It’s supposed to be : 100 - 40 - 20f. Because you are supposed to distribute the negative sign across the whole expression.

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Which expressions are equivalent to 16 x 4 minus 64 check all that apply

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3 years ago

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A pitcher contains 83.28 cups of iced tea. You drink 2.5 cups of the tea each morning and 0.75 cup of the tea each evening. When

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25 days of the iced tea

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3 years ago

10th grade geometry <br> Select statements that are true about angles on diagram

Goshia [24]

Answer:

B, C

Step-by-step explanation:

The only statements that must be true are ones that describe the markings on the diagram:

NO as an angle bisector

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2 years ago

Use the GCF to find a new sum for 54+48.<br> _ ( _ + _ )

Maru [420]

Answer: GCF is 6

Step-by-step explanation:

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3 years ago

Eric is studying people's typing habits. He surveyed 525 people and asked whether they leave one space or two spaces after a per

Otrada [13]

Answer: (0.8115, 0.8645)

Step-by-step explanation:

Let p be the proportion of people who leave one space after a period.

Given: Sample size : n= 525

Number of people responded that they leave one space. =440

i.e. sample proportion: $\hat{p}=\dfrac{440}{525}\approx0.838$

z-score for 90% confidence level : 1.645

Formula to find the confidence interval :

$\hat{p}\pm z^*\sqrt{\dfrac{\hat{p}(1-\hat{p})}{n}}$

$0.838\pm (1.645)\sqrt{\dfrac{0.838(1-0.838)}{525}}\\\\=0.838\pm (1.645)\sqrt{0.00025858285}\\\\=0.838\pm (1.645)(0.01608)\\\\= 0.838\pm0.0265\\\\=(0.838-0.0265,\ 0.838+0.0265)\\\\=(0.8115,\ 0.8645)$

Hence, a 90% confidence interval for the proportion of people who leave one space after a period: (0.8115, 0.8645)

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3 years ago