What number equals four fifths of the average of 18 and 42

24

Step-by-step explanation:

The average of 18 and 42 is (18 + 42)/2 = 60/2 = 30

4/5 of 30 = 4*30/5 = 120 /5 = 24

89

step-by-step explanation:

in problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. to find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

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