A researcher post a magazine advertisement offering $24 in exchange for participation in a short study. The researcher excepts the first six people who respond to the advertisement. Which of the following statements is true about the sample? It is not a valid sample because it is not a random sample of the population.
It is a valid sample because the first six people were selected to participate.
It is a valid sample because money was offered to participants.
It is not a valid sample because it is only a short study

How to solve a simultaneous equation involved with fractions?

What are the solution(s) to the quadratic equation x2 – 25 = 0? o x = 5 and x = -5ox=25 and x = -25o x = 125 and x = -125o no real solution

Michelle and julie work at a catering company. they need to bake 264 cookies for a birthday party that starts in a little over an hour and a half. each tube of cookie dough claims to make 36 cookies, but michelle eats about 1/5 of every tube and julie makes cookies that are 1.5 times as large as the recommended cookie size.it takes about 8 minutes to bake a container of cookies, but since julie's cookies are larger, they take 12 minutes to bake. a. how many tubes should each girl plan to bake? how long does each girl use the oven? b. explain your solution process what did you make? c. what assumptions did you make?