Find mean of the following data.
X 5 10 15 20
F 3 6 3 4
25
4​

If x = 12 and y = 3, what is the value of x - y 2? 81 6 3 18

The system of equations graphed below has how many solutions? y = 2x + 2

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)?