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Taya2010 [7]
3 years ago
12

Choose the correct conic section to fit the equation.x 2+ y 2= 9A. CircleB. EllipseC. ParabolaD. Hyperbola

Mathematics
1 answer:
poizon [28]3 years ago
7 0

we have to choose the correct conic section to fit the equation.x ^2+ y^ 2= 9. we know the equation of a circle is x^2 + y^2 = r^2

and if we compare both the equations we find that both are similar and we can even find the value of r by comparing both the equations.

So the correct conic section is circle

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Explain how you would subtract -4/5 from 9/10 .
Tpy6a [65]

Answer:

-17/10

Step-by-step explanation:

you have to find a common denomentaor first wich would be 10

then you have to mutiply -4/5 by 2 which would be -8/10

and then you would do regular subtraction

but since its a negative number your gonna actually add but then the final answer will be negative

-17/10

hope this helps I really suck with fractions

4 0
3 years ago
Factor by grouping: x^3+2x^2−6x−12. Which of the following is one of the factors?
kipiarov [429]

x³+2x²-6x-12=x²•(x+2)-6(x+2)=(x+2)•(x²-6)

6 0
3 years ago
The owner of a sporting goods store in Phoenix, Arizona surveys her customers to determine the proportion of customers that play
BabaBlast [244]

Answer:

C

Step-by-step explanation:

This is a sample proportion where p^ represents the sample proportion.

If we have p^ = 0.6, it means about 60% of the sample are in agreement with or significant to the case study.

The case study here is 'customers that play racquetball' and p^ was 0.16.

This means that 16% of the customers of the sample said they play racquetball.

3 0
4 years ago
The function C(x) = 25.50x + 50 models the total cost for a cleaning company to clean a house, where x is the number of hours it
vodomira [7]

Answer:

<em>The average rate of change is $25.5 per hour, option B.</em>

Step-by-step explanation:

<u>Average Rate of Change </u>

When we are explicitly given some function C(x), we sometimes need to know the rate of change of C when x goes from x=x_1 to x=x_2. It can be computed as the slope of a line .

\displaystyle m=\frac{C(x_2)-C(x_1)}{x_2-x_1}

The provided function is

C(x)=25.50x + 50

We are required to compute the average rate of change between the points

x_1=3\ ,\ x_2=9

Let's compute

C(3)=25.50(3) + 50=126.5

C(9)=25.50(9) + 50=279.5

\displaystyle m=\frac{279.5-126.5}{9-3}

\displaystyle m=\frac{153}{6}=25.5

The average rate of change is $25.5 per hour, option B.

7 0
4 years ago
Which expression represents the number 867
Sindrei [870]

Answer:

C. 500 + 300 + 50 + 10 + 7

Step-by-step explanation:

Which expression represents the number 867?

A. 80 + 60 + 70

B. 800 + 6 + 7

C. 500 + 300 + 50 + 10 + 7

D. 500 + 300 + 60 + 70

Checking the answer choices by adding the expression

A. 80 + 60 + 70

= 210

No correct

B. 800 + 6 + 7

= 813

Not correct

C. 500 + 300 + 50 + 10 + 7

= 867

Correct

D. 500 + 300 + 60 + 70

= 930

Not correct

Therefore option C. 500 + 300 + 50 + 10 + 7 is the correct answer

4 0
3 years ago
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