Ratio cost of one metre of cotton fabric to cost of one metre of silk 2:5

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.)

If i have one apple and give you the apple, how many apples do i have?

Angles r and s are complementary. the measure of angle r is 31 degrees. which equation can be used to find angle s?