Two variable equation

Evaluate: a-b if =-4 and b=10

Simplify: 16-8x4

Which function has the same domain as y=2x

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 florida was approximately two times the population of california. b. the population of florida was approximately twenty times the population of california. c. the population of california was approximately twenty times the population of florida. d. the population of california was approximately two times the population of florida.

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28