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3 years ago

20 POINTS PLEASE HELP ME

Mathematics

2 answers:

oksian1 [2.3K]3 years ago

6 0

The answer is c......just took the k12 test

Goryan [66]3 years ago

3 0

Answer:

The exponential model

Step-by-step explanation:

A coefficient of determination is a measure of how well the graph of a regression fits the data set. The closer this coefficient is to 1, the better the fit.

The closest coefficient we have to 1 is 0.91, which is that of the exponential model. This means the exponential model is the best fit.

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What are the center and radius of the circle defined by the equation x^2 + y^2 -6x + 8y + 21=0

NeTakaya

Answer:

Step-by-step explanation:

(x²-6x)+(y²+8y)=-21

(x²-6x+9)+(y²+8y+16)=-21+9+16

(x-3)²+(y+4)²=4

center=(3,-4),radius=√4=2

7 0

3 years ago

13. Don is running a race. He knows he can run 60 feet in 4 seconds. If he maintains this rate, how many miles will he run in 1

Lana71 [14]

Answer:

10.23 miles

Step-by-step explanation:

1 hour = 3600 seconds

$\frac{60}{4} =\frac{x}{3600} \\\\4x=216000\\x=54000$

54000 ft = 10.23 miles

5 0

3 years ago

Read 2 more answers

5x−y=3<br> −5x+2y=4<br> Which ordered pair satisfies the system of equations shown above?

ale4655 [162]

Answer:

$(2, 7)$

Step-by-step explanation:

We can solve this system of equations by using elimination.

In this case, we can eliminate x by adding the two equations:

$5x+(-5x)-y+2y=3+4\\5x-5x+y=7\\y=7$

Then, substitute 7 for y to solve for x:

$5x-y=3\\5x-7=3\\\text{Add 7 to both sides}\\5x=10\\\text{Divide both sides by 5}\\x=2$

Substitute both these values into the system to check our answer:

$5x-y=3\\5(2)-7=3\\10-7=3\\3=3\rightarrow \text{correct!}$

$-5x+2y=4\\-5(2)+2(7)=4\\-10+14=4\\4=4\rightarrow \text{correct!}$

Therefore the ordered pair is:

$(x, y)=(2, 7)$

6 0

2 years ago

2972 divided by 3!! Please help me!!

Tanzania [10]

990.6 there is 7 six

3 0

3 years ago

What is the definition of sample mean

Ne4ueva [31]

The sample mean from a group of observations is an estimate of the population mean . Given a sample of size n, consider n independent random variables X1, X2, ..., Xn, each corresponding to one randomly selected observation. Hope this helped:) Have a Great day!

6 0

3 years ago