Annette wants to find out which of two toothpaste brands people living in the town of Springville prefer, brand A or brand B. She uses a random sample to make this generalization: 60% of the population of Springville prefers brand A over brand B. For which random sample would this generalization be valid? A.
every third person who walks into one of the neighborhood convenience stores, which stocks several toothpaste brands
B.
every fourth student who attends Annette’s school in Springville
C.
every other customer at all the convenience stores in Springville that stock both brand A and brand B
D.
every mother who shops at a convenience store in Springville

1. supplementary angles

2. acd and bcd

step-by-step explanation:

you are playing an adventure game on your computer. you come across a troll who won't let you pass and there is no other way to get to the other side of the river except over the bridge he is guarding.

the troll is a nerd. he takes great delight in watching people struggle with his problems. very few get them. he only gives you one chance and then he changes the puzzle. you have to solve this one.

before you are four blocks. they are numbered 11,6, -7,21.

he tells that the answer he wants is minus and between -1 and - 2. you can use +, -, ×, ÷   ( and ) as many times as you like or no times at all. you don't like the way he's looking at you, but you need to cross the bridge. what do you do?