Which equation represents a line that is perpendicular to the line represented by y =2/3x+1

The area of a rectangle is 15+5y square feet. which of the following expressions could be the length of the sides of the rectangle, in feet a. 5 and 3y b. 5 and 3+y c. 5 and 5+y d. 3 and 5+3y

The equation of a parabola is given. y=18x2+4x+20 what are the coordinates of the focus of the parabola?

What are the domain and range of f(x)= -log5(x+2)