Solve the 2-step equation: -3/4+8=-7

Find the slope of a line given the following two points

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)?

Sketch one cycle if the cosine function y=2cos2theta