Describe the error made in subtracting the two rational expressions shown: 1/x-2-1/x+1=x+1/x-2(x+1)-x-2/(x+1)= -1/x-2(x+1)

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?

Does the point (1, sqrt 7) lie on circle shown.

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