Dos cruceros salen del muelle. El primer barco tiene 2230 pasajeros. El segundo barco tiene 1818 pasajeros. ¿Cuál es el número total de pasajeros en ambos barcos?

Iam trying to solve a linear equation for the shoe size of someone 84" tall taking into consideration example 1 is 69" tall with a shoe size of 9 and example 2 is 72 inches tall with a shoe size of 11. i understand that the equation should be y=mx+b and that on the graph the answer is (3,2) but i just don't understand how to create the equation to solve for 84-inches and 60-inches tall questions. after two days, i need .

1. what is the measure of ∠abc? what is the measure of ∠abd?

Which expression gives the exact value of x?