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elena-s [515]
3 years ago
8

Which of these is an example of a non-random sample?

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
6 0

The correct answer would be:

A) Sunbathers at a free suntan lotion booth on a popular beach were asked about their favorite suntan lotion.

-_-

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Systems of equations and inequalities<br> solving systems by elimination<br> {y= -x+1<br> {y= 4x-14
kodGreya [7K]

Answer:

x = 3  , y = -2

Step-by-step explanation:

Solve the following system:

{y = 1 - x | (equation 1)

y = 4 x - 14 | (equation 2)

Express the system in standard form:

{x + y = 1 | (equation 1)

-(4 x) + y = -14 | (equation 2)

Swap equation 1 with equation 2:

{-(4 x) + y = -14 | (equation 1)

x + y = 1 | (equation 2)

Add 1/4 × (equation 1) to equation 2:

{-(4 x) + y = -14 | (equation 1)

0 x+(5 y)/4 = (-5)/2 | (equation 2)

Multiply equation 2 by 4/5:

{-(4 x) + y = -14 | (equation 1)

0 x+y = -2 | (equation 2)

Subtract equation 2 from equation 1:

{-(4 x)+0 y = -12 | (equation 1)

0 x+y = -2 | (equation 2)

Divide equation 1 by -4:

{x+0 y = 3 | (equation 1)

0 x+y = -2 | (equation 2)

Collect results:

Answer: {x = 3  , y = -2

5 0
3 years ago
Read 2 more answers
4.5*10^-8/9*10^-9 find the quotient and write it in scientific form
g100num [7]

Answer:

5

Step-by-step explanation:

4.5*10^-8/ 9*10^-9

1) Reduce the fraction, express 9 as a product of multiplying 4.5*2

4.5*10^-8/4.5*2*10^-9

2) Then notice the common factor of numerator and denominator( 4.5) , get rid of it in both numerator and dnominator

3) 10^-8/ 2*10^-9= 1/2*(10^-8/10^-9)= 0.5* (10^-8/10^-9)

10^-8/10^-9= 10^(-8-(-9))= 10^1=10.

so 0.5*10=5 (it is the answer written in scientific form)

3 0
3 years ago
A theater production charges $21 for adult tickets and $15 for student tickets. If the
Zarrin [17]

Answer:

The number of adult tickets sold was 67, and the number of student tickets sold was 35.

Step-by-step explanation:

7 0
2 years ago
Find the length of segment AB if A (4, 1) and B(1,3). Round to the nearest hundredth, if needed.
viktelen [127]

Answer:

\sqrt{13}

Step-by-step explanation:

A(4;1) B(1;3)

●use distance formula (see photo^)

8 0
3 years ago
Find the distance from (8,-2) to (8,-16)
raketka [301]

Answer:

14

Step-by-step explanation:

- Square root of (x2-x1) squared + (y2-y1) squared

- which is square root of (8-8) squared + (-16-(-2)) squared

-simplify it, then get 14

6 0
3 years ago
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