If f:X is 3x + b and ff(2) = 12, find the value of b​

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

Jonah buys a television that costs $445. sales tax in his state is 7 percent. which of the following expressions represent the amount of tax on the television?

Ablue whale traveled 3112 miles in 214hours. what was the whale's rate in yards per hour? (1 mile = 1,760 yards)