Which one is a rational function? Select all that apply. [Study Guide #18] A y=2x2+x−3x2+2x+5y=\frac{2x^2+x-3}{x ^2+2x+5}y= x 2 +2x+5 2x 2 +x−3 B y=x+2x+4y=\frac{\sqrt{x}+2}{x+4}y= x+4 x +2 C y=3x5y=\frac{3^x}{5}y= 5 3 x D y=1xy=\frac{1}{x}y= x 1

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

step-by-step explanation:

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step-by-step explanation:

always plug in x. in this case, x equals 4.

i'm going to first solve 4(2+3x)

1) 4(2+3(4)) use pemdas to solve.

i'm going to multiply whats in the parenthesis first, so 3 times 4=12.

2)4 (2+12) i'm then going to multiply 4 by both numbers in the parenthesis (because multiplying comes before adding)

4 times 2= 8.   4 times 12= 48

4) (8+48)= 56 (answer)

i'm then going to solve 8+12x and plug in 4 for x.

1) 8 +12(4)

multiplying comes before adding, so i'm gonna multiply 12 and 4.

12 times 4= 48.

2) 8+48=56

both equal the same!

the reporter's right

step-by-step explanation:

1/4 = .25 / 25%

your answer is the frist one

hop i