Do the points (1, 5), (2.5, 9.5), and (4.5, 15.5) lie on the same line? How do you know? Prove your answer. That is the question theres no pic

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Under normal conditions, 1.5 feet of snow will melt into 2 inches of water. during a winter season high in the mountains, 301 feet of snow fell. how many inches of water will there be when the snow melts?

The weight of full–grown tomatoes at a farm is modeled by a normal distribution with a standard deviation of 18.4 grams. the 95 percent confidence interval for the mean weight of the tomatoes is calculated using a sample of 100 tomatoes. what is the margin of error (half the width of the confidence interval)?