Determine whether each quadrilateral is a parallelogram

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

The marked price of an article is 25% above its selling price and the cost price is 30% less than its marked price . find the discount percent and gain percent. only a brainlest can solve it i will mark you brainlest

I’m on question 7 it says a covered water tank is in the shape of a cylinder the tank has a 28 inch diameter and a height of 66 inches to the nearest square inch what is the surface area of the water tank