David paints 3 rooms in 7 hours at the same pace how long would it take him to paint 15 rooms

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Two line segments are shown in the figure below. suppose that the length of the line along the x-axis is 6, and the length of the hypotenuse of the triangle is 10. what is the equation of the hypotenuse line (shown in red, below)?

Let f(x) = 5/x and g(x)=2x2+5x. what two numbers are not in the domain of f o g