Question

craig is making 3 recipes for his party. he has a container of flour on his kitchen scale. the table shows the total change in weight of the flour on the scale after each of the 3 recipes. what is the average change in the amount of flour, in ounces, used in the 3 recipes?
after recipe 1: -2
after recipe 2: -3\frac{1}{2}
after recipe 3: -4\frac{1}{2}
a -\frac{3}{1}2
b -\frac{1}{2}2
c -\frac{1}{3}3
d -\frac{1}{2}7
how can you find an average?

Explanation:

Step1: Convert mixed numbers to improper fractions

• After Recipe 1: \(-2=-\frac{4}{2}\)
• After Recipe 2: \(-3\frac{1}{2}=-\frac{7}{2}\)
• After Recipe 3: \(-4\frac{1}{2}=-\frac{9}{2}\)

Step2: Find the sum of the changes

$$
LATEXBLOCK0
$$

Step3: Calculate the average

The average is the sum divided by the number of recipes (\(n = 3\)). So, \(\frac{-10}{3}=-\frac{10}{3}=-3\frac{1}{3}\)

Answer:

C. \(-3\frac{1}{3}\)