15 hey can you me out with these?

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)?

Graph the equationy= x+3[tex]y = x + 3[/tex]

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8