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beks73 [17]
3 years ago
9

A survey conducted at an ice cream store asked only mothers

Mathematics
1 answer:
Alecsey [184]3 years ago
3 0

Answer:

B. Biased Sample.

Step-by-step explanation:

The population is not only made of mothers, but there are fathers, sons, daughters, brothers and sisters, and a lot of other people. By selecting only mothers, it gears the survey to be biased towards a certain type of thinking.

~

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Mrs. Culland is finding the center of a circle whose equation is x2 + y2 + 6x + 4y – 3 = 0 by completing the square. Her work is
andrew11 [14]

The correct answer is:

(x + 3)^2 + (y + 2)^2 = 4^2, so the center is (–3, –2)

Further explanation:

The given equation of circle is:

x^2+y^2+6x+4y-3 = 0

In order to complete the square the terms have to be combined first

x^2+y^2+6x+4y = 3\\x^2+6x+y^2+4y=3\\(x^2+6x)+(y^2+4y) = 3

9 and 4 will be added to both sides of the equation to complete the square

(x^2+6x+9)+(y^2+4y+4) = 3+9+4\\(x^2+6x+9)+(y^2+4y+4) = 16

The next step completes the work

(x+3)^2+(y+2)^2 = (4)^2\\

Comparing with the standard form of circle

(x-h)^2 + (y-k)^2 = r^2\\x - h = x+3\\h=-3\\y-k = y+2\\k = -2

As the centre is (h,k), the centre of given circle will be:

(-3,-2)

Hence the correct answer is:

(x + 3)^2 + (y + 2)^2 = 4^2, so the center is (–3, –2)

Keywords: Circle, Equation of Circle

Learn more about equations of circles at:

  • brainly.com/question/3055705
  • brainly.com/question/3333996
  • brainly.com/question/3456442

#LearnwithBrainly

4 0
3 years ago
Rewrite the following equation in exponential form. log^5 25=2​
Alina [70]

logb(x) = y is equivalent to b^y =x

y = 2

b = 5

x = 25

Substitute the values to get 5^2 = 25

6 0
3 years ago
What is the difference?<br> -6-(11)<br> 1-17<br> -5<br> O 5<br> 017
Roman55 [17]

Answer:

-17

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Someone please help :)
larisa86 [58]
The answer is 6m djsjdjjsskskksksksksksksmsmsm
8 0
3 years ago
33+34+35+36+...+104 what is the sum of the sequence?
Ray Of Light [21]
This is an arithmetic series, so we know, that:

Sum = (First term + Last term) * Number of terms /2

Here we have:

First term = 33
Last term = 104
Number of terms = 104 - 33 + 1 = 72

and

S=(33+104)\cdot\dfrac{72}{2}=137\cdot36=\boxed{4932}
6 0
3 years ago
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