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telo118 [61]
2 years ago
14

Which expression is not equvialet to 28ax

Mathematics
1 answer:
Umnica [9.8K]2 years ago
3 0

2(19-7) im pretty sure

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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:

<em>The question is incomplete:</em>

<em>"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."</em>

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
Is this relation a function?
Sliva [168]

Answer:

True

Step-by-step explanation:

First two points are inverse of last two points, all points reflects each other over y = -x

3 0
3 years ago
Pythagorean theorem
Talja [164]

Answer:

b=20 yards

Step-by-step explanation:

15^2+x^2=25^2

225+x^2=625

x^2=400

x=20

5 0
3 years ago
A seller buys an item from a manufacturer for $9,500. He increases the cost by 5 percent. What is the markup value?
Lynna [10]

5% of 9,500 is 475 so you would add them together. 9,500 + 475 = 9,975 so 9,975 is the answer

5 0
3 years ago
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Let f(x) = 8x3 − 22x2 − 4 and g(x) = 4x − 3. Find f of x over g of x
SVEN [57.7K]
F(x) = 8x³ - 22x² - 4
g(x) = 4x - 3

(f \div g)(x) = \frac{8x^{3} - 22x^{2} - 4}{4x - 3}
(f \div g)(x) = \frac{2(4x^{3}) - 2(11x^{2}) - 2(2)}{4x - 3}
(f \div g)(x) = \frac{2(4x^{3} - 11x^{2} - 2)}{4x - 3}

3 0
3 years ago
Read 2 more answers
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