Find the x and y intercept of the graph of the equation y=1/4x-3

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

Koji is installing a rectangular window in an office building. the window is 823 feet wide and 534 feet high. the formula for the area of a rectangle is a=bh. what is the area of the window? enter your answer as a mixed number in simplest form in the box. $$ ft2

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)