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givi [52]
3 years ago
14

Which of these is an example of a random sample?

Mathematics
1 answer:
Stels [109]3 years ago
7 0
The answer is B. The other answer choices are incorrect because they include only a certain group of people so it wouldn't be as random.
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PLEASE HELP ME MATH LOVERS!!!!!! WILL GIVE BRAINLIEST!!!!!!!!
Romashka [77]

One) One millivolt is one thousandths of a volt.

Two) One megagram is one million grams.

8 0
3 years ago
Read 2 more answers
Please help math
Naddika [18.5K]
   
\displaystyle\\
15(2a - 2) = 5(a^2 -1) \\  \\ 
30a - 30 = 5a^2-5\\\\
-5a^2 + 30a -30 + 5 =0\\\\
-5a^2 + 30a -25 =0 ~~~~~\Big| \times (-1) \\\\
5a^2 - 30a +25 = 0~~~~~\Big| : 5 \\\\
a^2 - 6a +5 = 0 \\  \\ 
a_{12}= \frac{-b\pm \sqrt{b^2-4ac}}{2a}= \frac{6\pm \sqrt{36-20}}{2}= \frac{6\pm \sqrt{16}}{2}=\frac{6\pm 4}{2}= \boxed{3\pm 2} \\  \\ 
a_1 = 3+ 2 = \boxed{5}\\\\
a_2 = 3-2 = \boxed{1}



8 0
3 years ago
Read 2 more answers
How do you graph y=-3x+2 and -3x-y=-2 (change into slope intercept form first) then check your answer. The picture is how the fo
Leni [432]
Y=-3x+2:
Already in slope intercept form
Graph by plotting a point on (0,2)
Then move 3 points up and 1 to the right and plot the point and keep doing that a couple times

-3x-y=-2:
Add -3x on both sides
The result would be
-y=3x-2
Divide everything by negative 1
Y=-3x+2

Both equations are the same so they are the same line
8 0
3 years ago
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How many solutions does this equation have?
Greeley [361]

Answer:

No solution

Explanation:

-4+19-7f = -15-7

cancel terms on both sides ( add 7f on both sides)

Calculate the sum

-4+19= -15

-4+19=15

15 = -15

The statement 15 = -15 is false so there is no solution :)

4 0
3 years ago
What is 20 increased 30%.
Reptile [31]
<span>When 20 is increased by 30% of itself 

</span><span>When 20 is added to by (30% OF 20)
</span><span>
20 + (30% x 20)

</span><span>20 + (0.3 x 20) 
</span><span>
20 + (6) 

</span>26
5 0
3 years ago
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