The sum of two numbers is 87. The difference of the same to numbers is negative 111. Find the numbers.

Solve the system of equations. y= 2x y= x^2 - 15

Solve each equation using the quadratic formula. find the exact solutions. 6n^2 + 4n - 11

According to the 2008 u.s. census, california had a population of approximately 4 × 10^7 people and florida had a population of approximately 2 × 10^7 people. which of the following is true? a. the population of california was approximately two times the population of florida. b. the population of florida was approximately twenty times the population of california. c. the population of florida was approximately two times the population of california. d. the population of california was approximately twenty times the population of florida.