Alexi surveys a random sample of 100 students at his school and finds that 50 of them usually walk to school. There are 2,000 students at the school. Is it reasonable to think that out of the 2,000 students 400 of them walk to school? Explain why or why not

What is the solution to the equation 9^(x+1) =27

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Antonia and carla have an equivalant percentage of green marbles in their bags of marbles. antonia has 4 green marbles and 16 total matbles. if carla has 10 green marbles , how many total marbles does carla have