mrs. heise bought 7 tickets to a movie and spent $43. she bought a combination of children's tickets for $4 each and adult tickets for $9 each. how many children's tickets did she purchase?

Which value of m will create a system of parallel lines with no solution? y = mx - 6 8x - 4y = 12

Find the distance between (7,-6) and (-3,-9)

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.