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AysviL [449]
3 years ago
5

George does not like the fact that his neighborhood makes it mandatory to pay a yearly fee to use the pool. He conducts a survey

of all the neighborhood families to help support his case that the yearly fee should be voluntary. The survey asks questions about pool usage and financial statistics of the families. Is this a valid survey? Why or why not?
A) No, George should only survey families that support his view.
B) No, George should attach information about why the fee should be voluntary.
C) Yes, since George is trying to convince the board to change the requirement he needs results to support his opinion.
D) Yes, since George is surveying all of the families in his neighborhood he is getting the opinions of the entire population.
Mathematics
2 answers:
murzikaleks [220]3 years ago
7 0

Answer:

I would pick the letter C

Step-by-step explanation:


trasher [3.6K]3 years ago
4 0

Answer:

C

Step-by-step explanation:

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What percent of 50 is 20?
Papessa [141]

Answer:

40%

Step-by-step explanation:

20/50

= 2/5

= 0/4

= 40%

3 0
2 years ago
Evaluate the expression when x=2 . -3x+1.5+2.5x-4.5+8x
dlinn [17]

Answer: 12

Step-by-step explanation:

For this problem, all you have to do is plug in x=2 into all the x you see.

-3(2)+1.5+2.5(2)-4.5+8(2)

-6+1.5+5-4.5+16=12

3 0
3 years ago
Phyllis invested 47000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of 6
Alexandra [31]

Answer:

31000 dollars were invested at 4% interest rate.

16000 dollars were invested at 5% interest rate.

Step-by-step explanation:

Convert the interest rate into decimal and then write down two equations to solve for the unknowns.

\begin{bmatrix}0.04x+0.06y=2200\\ x+y=47000\end{bmatrix}

\mathrm{The\:solutions\:to\:the\:system\:of\:equations\:are:}\\\\x=31000,\:y=16000

Best Regards!

5 0
3 years ago
Factor sec^2x-secx+tan^2x
marysya [2.9K]

Answer:

sec²(x) - sec(x) + tan²(x) = (sec(x) - 1)(2sec(x) + 1)

Step-by-step explanation:

sec²(x) - sec(x) + tan²(x) =

= sec²(x) - sec(x) + [sec²(x) - 1]

= sec²(x) - sec(x) + [(sec(x) + 1)(sec(x) - 1)]

= sec(x)[sec(x) - 1] + [(sec(x) + 1)(sec(x) - 1)]

= (sec(x) - 1)(sec(x) + sec(x) + 1)

= (sec(x) - 1)(2sec(x) + 1)

6 0
3 years ago
10% of £26 is equal to x% of £52. Calculate the value of x.<br><br>​
irina1246 [14]

Answer:

5

Step-by-step explanation:

26 × 10 ÷ 100 = 52 · x ÷ 100

260 = 52 · x

x = 5

6 0
3 years ago
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