Work out the value of x

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.)

Acircle has a circumference of 28.36 units what is the diameter of the circle

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10