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RoseWind [281]
3 years ago
11

A researcher posts a newspaper advertisement offering $20 in exchange for participation in a short study. The researcher accepts

the first five people who respond to the advertisement. Which of the following statements is true about the sample?
It is not a valid sample because it is only a short study.

It is a valid sample because money was offered to participants.

It is a valid sample because the first five people were selected to participate.

It is not a valid sample because it is not a random sample of the population.
Mathematics
2 answers:
Kamila [148]3 years ago
8 0

Answer:

It's D). It is not a valid sample because it is not a random sample of the population.

Step-by-step explanation:

I took the test and got it right.

Alona [7]3 years ago
3 0

Answer:

The answer is "It is not a valid sample because it is not a random sample of the population".

Step-by-step explanation:

I had this test and that was my answer, and it was correct.

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7 0
2 years ago
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What is 9 - (-8) = 20 and how did you get that answer?
Colt1911 [192]

Answer: No solution

Step-by-step explanation:

9-(-8)=20             given

9+8=20                the two negatives cancel out, making the eight positive

17=20                   this statement is not correct, so the answer is no solution

no solution

I'm not sure if there was supposed to be a variable in there somewhere, but I did my best to explain. Hope this helps!

4 0
3 years ago
Read 2 more answers
I will mark brainliest, please help !!
Elena L [17]

Answer:

x = 5/(a-b+3)

Step-by-step explanation:

ax+3x=bx+5

Collect all the terms that has x:

ax-bx+3x = 5 (Subtracting bx both sides)

Take out the x!

x(a-b+3) =5

Divide (a-b+3) both sides to solve for x

x = 5/(a-b+3)

Hope this helps!

Would really appreicate the brainliest!

7 0
3 years ago
Solve the following equation for x.<br> 11x– 1 = -89
muminat

Answer:

x = -8

Step-by-step explanation:

11x– 1 = -89

Add 1 to each side

11x– 1+1 = -89+1

11x = -88

Divide each side by 11

11x/11 = -88/11

x = -8

3 0
2 years ago
The cost for x number of students to attend an after school sporting event can be represented bu the functon C(x). If C(124) = 5
lara [203]
Alright! Given that C(x) is Cost(Students) = 558, we can eliminate:

2. 558 students paid to attend the event.
5. The event generated $124 from student revenue.

Now, in order to find the cost per student we simply divide 124 on both sides:

\frac{C(124)}{124} =  \frac{558}{124}

124 cancels on the left and 558/124 is 4.5 or $4.50. 

Since we just determined the cost of one student, we can eliminate 3.

To check if 124 students paid, we simply add the cost to the equation and check:

4.5(124) = 558

558 = 558 √

It checks out, so we determined that both 1 and 4 are correct.
7 0
3 years ago
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