Esta en ingles. me podrían ayudar con la primera pregunta por favor?

Translate the word phrase into a math expression. 15 fewer than the product of 4 and a number. (pls immediately)

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.)

Three times the sum of a number and seven is negative thirty-six. what is the number?