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3 years ago

Which equation below describes a circle. What are the coordinates of the center of the circle

1 answer:

8 0

The equation for a circle is
(x - h)^2 + (y - k)^2 = r^2 where r is the radius and the center is (h,k). I don’t see any options for answers though so I can’t help with the last part.

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The probability is 0.2 that a person shopping at a certain store will spend less than $20. For groups of size 17, find the mean

Mila [183]

Answer:

<em>The correct option is : C. 3.4</em>

Step-by-step explanation:

The probability that a person shopping at a certain store will spend less than $20 is 0.2

That means, here $p= 0.2$

Given that, the sample size $(n)= 17$

So, the Mean $=n*p= 17*0.2=3.4$

Thus, the mean number who spend less than $20 will be 3.4

8 0

3 years ago

Marla has $95.50 in her savings account. She deposits $5 every week. Her mother also deposits $20 into the account every time Ma

Elenna [48]

The answer is for first one : 70.50 and other one is idk so sorry for the other one but I knew the first one bye!

4 0

3 years ago

A researcher was interested in the relationship between a swimmer’s hand length and corresponding time to complete the 100-meter

dybincka [34]

Answer:

[B] A two-sample t -test for a difference between means.

Step-by-step explanation:

"<u>A two sample t test for a difference in means was conducted to investigate whether the average time to swim a lap with the freestyle stroke is different from the average time to swim a lap with the butterfly stroke</u>."

3 0

3 years ago

Solve for value of B

yan [13]

Answer:

b = 6

Step-by-step explanation:

$(6b - 7) \degree + 90 \degree + 61 \degree = 180 \degree \\ \\ (6b - 7) \degree + 151 \degree = 180 \degree \\ \\ (6b - 7) \degree = 180 \degree - 151 \degree\\ \\ (6b - 7) \degree = 29 \degree \\ \\ 6b - 7 = 29 \\ \\ 6b = 29 + 7 \\ \\ 6b = 36 \\ \\ b = \frac{36}{6} \\ \\ \huge \purple{ \boxed{ b = 6}}$

7 0

3 years ago

Lavania is studying the growth of a population of fruit flies in her laboratory. After 6 days she had nine more than five times

MatroZZZ [7]

Answer:

Lavania observed 39 fruit flies after 6 days of observation

Step-by-step explanation:

Let x be the number of fruit flies on the first day of Lavania's study.

After 6 days she had nine more than five times as many fruit flies as when she began the study.

Five times as many fruit flies as when she began the study = 5x

Nine more than five times as many fruit flies as when she began the study=5x+9

The expression to find the population of fruit flies Lavania observed after 6 days is 5x+9

If she observes 20 fruit flies on the first day of the study, then x=6, then

$5x+9=5\cdot 6+9=30+9=39$

5 0

3 years ago