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cluponka [151]
3 years ago
13

Which is an example of an experiment? A. Testing the effectiveness of a new hair product by allowing one group to use it and com

paring results against a group that doesn't use it B. Collecting the cholesterol readings of a group of individuals of a certain age group in a small town C. Calling a sample of registered voters before an election to find out what issues concern them most D. Finding out the number of monthly burglaries of a residential neighborhood for a statistical study for the police
Mathematics
2 answers:
ycow [4]3 years ago
4 0

Answer:

A IS THE ANSWEERRRRRR

Step-by-step explanation:

Bezzdna [24]3 years ago
3 0
A is the answer cause u are testing and comparing
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The area of a circle with radius 1 cm is ______________. (Use 3.14 for pi)
Tcecarenko [31]

Answer:

6,28

Step-by-step explanation:

NOT NEEDED FOR THIS QUESTION

7 0
3 years ago
<img src="https://tex.z-dn.net/?f=n%20%7B%20%7D%5E%7B2%7D%20%20%2B%206n%20%2B%205" id="TexFormula1" title="n { }^{2} + 6n + 5"
Anastasy [175]

Answer: (n+5)x(n+1)

Step-by-step explanation:

1. Write 6n as a sum

2. Factor out n form the expression

3. Factor out n+5 from the expression

(n+5)x(n+1)

8 0
3 years ago
Find the Area of the figure below,
murzikaleks [220]

Answer:

169.1 unit^2 to the nearest tenth.

Step-by-step explanation:

Area of the parallelogram = base * height

= 24 * 6 unit^2.

Area of the semicircle = 1/2 pi r^2.

Here r = 1/2 * 8 = 4.

So the area is 1/2 * pi * 4^2

= 8pi unit^2.

The area of the whole figure = 24*6 + 8pi

= 169.13 unit^2.

3 0
3 years ago
What is the image of point (4, 5) after a counterclockwise rotation of 270º about the origin?
andriy [413]
A <span>counterclockwise rotation of 270º about the origin is equivalent to a </span><span>clockwise rotation of 90º about the origin.

Given a point (4, 5), the x-value, i.e. 4 and the y-value, i.e. 5 are positive, hence the point is in the 1st quadrant of the xy-plane.

A clockwise rotation of </span><span>90º about the origin of a point in the first quadrant of the xy-plane will have its image in the fourth quadrant of the xy-plane. Thus the x-value of the image remains positive but the y-value of the image changes to negative.
Also the x-value and the y-value of the original figure is interchanged.
For example, given a point (a, b) in the first quadrant of the xy-plane, </span><span>a counterclockwise rotation of 270º about the origin which is equivalent to a <span>clockwise rotation of 90º about the origin will result in an image with the coordinate of (b, -a)</span>

Therefore, a </span><span>counterclockwise rotation of 270º about the origin </span><span>of the point (4, 5) will result in an image with the coordinate of (5, -4)</span> (option C)
3 0
3 years ago
3x + 4y = 24<br> 6x + 8y = 24 using process of elimination
Lelechka [254]

Answer:

false

Step-by-step explanation:

3x+4y=24 multiplied by 2 equals: 6x+8y=48

if you subtract 6x+8y=24 from 6x+8y=48, you get 0=24, which is not true. Therefore the statement is false.

7 0
3 years ago
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