Expand and simplify the following expression:
(2x + 1)^2 – (2x + 1)

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

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)?