4. Which of the following statements is correctly matched with its expression? Select all that apply.
A. "Eight times x" can be represented by the expression 8x.
B. "x minus thirteen" can be represented by the expression x - 13.
C. "Twenty-four divided by x" can be represented by the expression x + 24.
D. "x plus 2" can be represented by the expression x + 2.
E.“3 less than z" can be represented by 3 - Z.

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

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copy and paste, put it in google

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step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

(23*2)-12=x     x=34

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