Solve 1/3/5 = a/20

A. a = 3/5
B. a = 3/4
C. a = 4/3
D. a = 5/3

2x+3y=12 x-y=6 solve the following system equations

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

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)?