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3 years ago

Multiply and simplify: (2b2+2b)2

Mathematics

1 answer:

sveta [45]3 years ago

4 0

Answer:

4b^2+2b (b^2 means b squared)

Step-by-step explanation:

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The researcher trains a sample of 16 individuals in mindfulness and then collects data on how long they spend eating per day. Th

Mila [183]

Answer:

The calculated t-value is t=0.47.

Step-by-step explanation:

The question is incomplete:

"Americans typically eat quickly and do not spend time enjoying their meal. A researcher plans to test if those trained in mindfulness will take more time to enjoy their meal (that is, they will spend more time eating than the general population). The general population spends an average of 68 minutes per day combined eating their three meals. The researcher trains a sample of 16 individuals in mindfulness and then collects data on how long they spend eating per day. The sample mean for those trained in mindfulness equals 74; the SS = 150. What is the calculated t-value? Round your answer to two decimal places."

The degrees of freedom are (n-1)=(16-1)=15

The standard deviation is:

$s=\sqrt{\frac{SS}{n-1}}=\sqrt{\frac{150}{16-1}}=\sqrt{10}=3.16$

The t-value can be calculated as:

$t=\frac{M-\mu}{\sigma/\sqrt{n}} =\frac{74-68}{3.16/\sqrt{16}} \\\\t=\frac{6}{3.16*4}=\frac{6}{12.64}= 0.47$

4 0

3 years ago

Choose all of the addition Adams in which you in exams to align place values in the Attic

solong [7]

+, //, attic. I think this is what your asking be more detailed.

4 0

3 years ago

13. What values of x satisfy the inequality 4x + 2 > 10? * What is the answer

mojhsa [17]

Answer:

Hi! The answer to your question is x > 2

Step-by-step explanation:

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☆Brainliest is greatly appreciated!☆

Hope this helps!!

- Brooklynn Deka

4 0

3 years ago

Read 2 more answers

To divide a decimal number by 1,000, move the decimal point _____.

valkas [14]

The answer is 3 places to the left

6 0

3 years ago

THIS IS REALLY IMPORTANT 7TH GRADE MATH:

Oksana_A [137]

Rectangle perimeter is 53 meters.

L = W + 2.3

To find the options of a perimeter, divide by 4.

= 13.25

So if this was a square, it would be 13.25 for both L and W but it's not.

Since the W has 2.3 meters more then the L, we do this.

13.25 + 2.3 = 15.55

13.25 - 2.3 = 10.95

Two of your sides equal 15.55, and the other two equal 10.95.

Hope this helps!

3 0

3 years ago