12 13 15 16 17 18 TIME REMAINI 57:08 A citizen wants to propose to the city council extending the hours at the local public library on some weekdays To measure support for extended hours, the citizen visits neighborhood homes and asks adults the following: "Would you agree that the closing time of the library should be extended by one hour on weekdays to accommodate working families of the 212 adults surveyed, B6% agreed with the statement Which of the following statements about the results is true? The 86% support provides substantial evidence that the library hours should be extended More families should be asked the same question to be sure of community support The survey suffers from question wording bias and may not represent true support for the extended hours The survey suffers from voluntary response bias and may not estimate true support for the extended hours Save and Exit

Which ordered pair (c, d) is a solution to the given system of linear equations- c+2d=13 -9c-4d=-15

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?

Suppose we have a set of small wooden blocks showing the 26 letters of the english alphabet, one letter per block. (think of scrabble tiles.) our set includes 10 copies of each letter. we place them into a bag and draw out one block at a time. (a) if we line up the letters on a rack as we draw them, how different ways coukl we fill a rack of 5 letters? (b) now suppose we just toss our chosen blocks into a pile, and whenever we draw a letter we already have, we put it back in the bag and draw again. how many different piles of 5 blocks could result? possible? piles will contain at least one repeated letter? (c) if we draw out 5 blocks wit hout looking at them, how many different piles are (d) if we draw out 5 blocks without looking at them, how many of the possible 2. (4) consider the following formula. 12 give two different proofs, one using the factorial formulas and the other combina torial.