Can somebody help me with writing proof

The actual width ( w) of a regulation soccer field is 90 meters (m), and the actual length is 120 meters (m). a coach has drawn a scale model of the field on a blackboard. if the longest side of his drawing is 18 cm, how long is the other side of the drawing( w)?

Which of the following could be the graph of the equation y = -2x + 5

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)