The numerator and denominator of a fraction are in the ratio of 2 to 5. If the numerator and denominator are both
decreased by 2, the fraction is now equal to 1.
If n = the numerator and d = the denominator, which of the following systems of equations could be used to solve the problem?

•5n = 2d and n - 2 = 2d-4
•5n = 2d and 2n- 4 = d-2
•2n = 5d and 2n- 4 = d-2
• 2n = 5d and n - 2 = 2d-4

What is the value of x in the equation (2)3) (x+6)= -18 a. -36 b. -33 c. -24 d. -18

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In a survey of 1015 adults, a polling agency asked, "when you retire, do you think you will have enough money to live comfortably or not. of the 1015 surveyed, 534 stated that they were worried about having enough money to live comfortably in retirement. construct a 90% confidence interval for the proportion of adults who are worried about having enough money to live comfortably in retirement.