Solve the system.
5r - 5s + 4t = 15
3r + 5s - 6t = 7
-r + 5s - 5t = 20

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.)

Which of the following statements would be sufficient to prove that parallelograms pqrs is a rectangle ?

Given: prst square pmkd is a square pr = a, pd = a find the area of pmct.