Is 10% of 10% of 100 the same as 20% of 100?

In what form is the following linear equation written y=9x+2

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

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°?