In 2012 five US postal stamps cost $2.20 how much did 7 stamps cost

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Solve each quadratic equation by factoring and using the zero product property. 14x - 49 = x^2

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.