If f(x)=x-5, find x when f(x)=15

The chart below shows the distribution of weeds in yard

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)?

Write an equation for the function that includes the points (1,4/5) and (2,2/3)