N+9/4n+36 simplify this

Sasha drank 8 bottles of water everyday for a week. how many bottles of water did she drink in total?

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)?

The area of a circle is equal to 1 dm². find the radius of the circle.