What expression is equivalent to 5x - 30?

When you are making a circle graph by hand, how do you convert a number for a part into its corresponding angle measure in the circle graph? when you are making a circle graph by hand, what should you do if one of your angle measures is greater than 180°?

In the triangles, bc =de and ac fe.if the mzc is greater than the mze, then ab isdfelth

2/3(-6y+9x) expand each expression using the distributive property