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3 years ago

9

The equation x2 + y2 − 2x + 2y − 1 = 0 is the general form of the equation of a circle. What is the standard form of the equatio

n?

1 answer:

8_murik_8 [283]3 years ago

5 0

(x – h)^2<span> + (y – k)^</span>2<span> = r^2</span><span>, this is the standard form of circle if you asking in that way..</span>

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Steve wants to know what the average ACT scores of students graduated from his high school is. He randomly selected 25 students

beks73 [17]

Answer:

[a]. sample is 25 randomly selected students

also population is all students

[b]. (20.0, 23.0)

[c]. (8.8, 24.2)

Step-by-step explanation:

here is a step by step process to solving this, i hope you find this helpful.

1). The population is all students who graduated from his school while the

sample is 25 randomly selected students from the email list

2). given alpha = 1-0.86=0.14

critical z value(two tailed) for 86% confidence level is:

z=normsinv(0.07) or normsinv(0.93)=1.476

Margin of error=1.476*(4.6/SQRT(20))=1.5

86% confidence interval for population mean

=21.5+/-1.5

=(20.0, 23.0)

3). if population standard deviation is not known,we will use t distribution.

df=20-1=19

t*=tinv(0.05,19)=2.093

Margin of error=2.093*(5.7/sqrt(20))=2.7

95% confidence interval for population mean

=21.5+/-2.7

=(18.8, 24.2)

cheers i hope this helps!!!!

3 0

3 years ago

What does m2+ m3= ???????????

zimovet [89]

Answer:

M2+m3=90

Step-by-step explanation:

Angle 1 already is equal to 90. A triangle can only go up to 180 wo the other two angles have to add up to 90.

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3 years ago

The watering can contained 5 1/2 quarts of water. After all the plants were watered, only 4 cups remained. How many cups of wate

Ivahew [28]

Answer: 9.5 cups of water

Step-by-step explanation:

5 1/2 + 4

5 1/2= 11/2

11/2+4=9.5

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4 years ago

What is the area to this??

jolli1 [7]

Answer:

30 units squared

Step-by-step explanation:

1/2(base)(height)

base=10

height=6

1/2(10)(6) = 5*6 = 30!

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3 years ago

Read 2 more answers

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Rom4ik [11]

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Answer:

A, M, N, F

Step-by-step explanation:

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The red and turquoise dashed lines are the lines y=x and y=-x, respectively. The same-colored arrows show the reflection of the relevant point.

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(x, y) ⇒ (-x, y) . . . . reflection over y-axis

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3 years ago