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Vlad1618 [11]
3 years ago
15

(x - 2)2 + (y + 4)2 = 49

Mathematics
1 answer:
frez [133]3 years ago
5 0

Answer:

2(x+y+2)=49

Step-by-step explanation:

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a large school surveys 100 people by taking random samples of 10 teachers and 90 students. what type of sample is this
bearhunter [10]

Answer:

Stratified Sampling

Step-by-step explanation:

Stratified sampling involves dividing the population into subpopulations that may differ in important ways. It allows you draw more precise conclusions by ensuring that every subgroup is properly represented in the sample.

To use this sampling method, you divide the population into subgroups (called strata) based on the relevant characteristic (e.g. gender, age range, income bracket, job role).

Based on the overall proportions of the population, you calculate how many people should be sampled from each subgroup. Then you use random or systematic sampling to select a sample from each subgroup.

I hope this helped!

6 0
2 years ago
Help please. need serious
iris [78.8K]
Ertex angle:: x degrees
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5 0
3 years ago
I don’t even know what I’m doing
larisa86 [58]

Answer:

(8, -22)

Step-by-step explanation:

The tables each contain four (x,y) points of a straight line. You can see that for every increase of x by 2, y decreases by 8 in the first one (observe 26, 18, 10 2), and decreases by 6 in the second.

If you continue the table with x=4, 6 and 8, you get y=-22 in both cases for x=8. That is the intersection, so the solution is (8,-22).

Added a graph. The equations are y=10-4x and y=2-3x respectively. Hope you understand a bit of this (brief) explanation.

5 0
2 years ago
Can someone please explain this Trig question, Find sec(x) in terms of sin(x)
Scilla [17]

The explanation is:

 The definition of "secant of (x)" is:  1 / (sine of x) .

5 0
3 years ago
What is the name of the shape graphed by the function r = 2 - costheta
Afina-wow [57]

Answer:

limaçon (no inner loop)

Step-by-step explanation:

The equation of a limaçon is written generically as ...

r = b + a·cos(θ)

For b=2 and a=1, this would put the flat side on the left. Rotating it 180° can be accomplished by adding or subtracting π from θ. Then the equation can be ...

r = 2 + cos(θ-π) . . . . or ...

r = 2 - cos(θ)

8 0
2 years ago
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