HELP PLZ STANDARD FORM

Is it true or false i’m trying to pass this test so i can leave school

What is the value of x in the equation7x+2y=48 when y=3

When a 757 passenger jet begins its descent to the ronald reagan national airport in washington, d.c., it is 3900 feet from the ground. its angle of descent is 6 degrees. how far must the plane fly to reach the run way? a. 37,106 ft b. 37,310.4 ft c. 23,456.6 ft d 2,492.7 ft