What is the simplified form of each expression? question 1: 3x+7x+2x A. 12x B. 10+2x C. 12+5x D. 10x
question 2: 2(8x) A.16x B.2(8)+2(x) C.10+x D.10x
question 3: 4(3x+2y) A.20x B.12x+8y C.20xy D.12x+2y​

How can you find the mean absolute deviation (mad) for this set of data?

Atest consists of 10 multiple choice questions, each with 5 possible answers, one of which is correct. to pass the test a student must get 60% or better on the test. if a student randomly guesses, what is the probability that the student will pass the test?

The biologist has a second culture to examine. she knows that the population of the culture doubles every 15 minutes. after 1 hour and 15 minutes, her assistant found that 80,000 bacteria were present. a) what was the size of the initial population? b) predict the size of the culture at t=3 hours. what was the size of the population at 40 minutes? explain and justify your answers. c) create a graph of the population as a function of time. find an equation that can be used to predict the size of the population at any time t. d) examine the rate at which the bacteria culture is growing. how fast is the culture growing after 1 hour? after 1.5 hours? after 2 hours? use a time interval of h = 0.01 hours to estimate these rates. interpret these rates in terms of the context of the problem situation. how do these three rates compare?