Mark owns a personal training business. he makes a total of $500 for every 3 clients he
acquires.

The perimeter of a movie screen is 54 meters. the screen is 18 meters wide. how tall is it?

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.

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?