What is 10x2 and what is 45-8

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

In which form is the following function written? y = - 2(x – 3)(x + 5)

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