64x squared-144x+x squared

What is the point-slope form of the equation for the line with a slope of -2 that passes through (1,4)?

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)?

Tell whether the two rates form a proportion