Margin left question on perimetre class 5th

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

Astudent must have an average on five test that is greater than it equal to 80% but less than 90% to receive a final grade of b. devon's greades on the first four test were 78% 62% 91% and 80% what range if grades on the fifth test would give him a b in the course? ( assuming the highest grade is 100%)

What are the coordinates of the image of p for a dilation with center (0, 0) and scale factor 2