39. If one student can complete the decorations for the prom in 5 days working alone, another student could do it in 3 days, and a third could
do it in 4 days, how long would it take them working together?

Definition: es. this is a disadvantage or weak point that makes someone or something less effective.

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

How is working backward similar to solving an equation?