Which equation represents a line that is perpendicular to the line whose equation is y = 4x + 12?

y = 4x + 4
y = -4x + 7
y = (-1/4x) + 1
y = (1/4x) + 9

Areal estate agent earns $32,000 a year plus $1,000 for each apartment he sells. write an equation that shows the relationship between the number of apartments abe sells,n, and the total amount he earns in a year,e. what is the total amount abe would earn from selling 10 apartments in one year

The bottom of ignacio's desktop is 74.5cm from the floor. ignacios sits in his adjustable chair, and the tops of his legs are 49.3cm from the floor. each clockwise rotation of the knob on the chair raises ignacio's legs by 4.8cm. write an inequality to determine the number of clockwise rotations, r, ignacio could make with the knob without his legs touching the desk.

What is the perimeter of an equilateral triangle if each side is (x+3)?