How do i write an equivalent expression in standard form for (-3x +/3)

Arectangle has a width of 5 cm and a length of 10 cm. if the width is increased by 3, how does the perimeter change?

Carley bought a jacket that was discounted 10% off the original price. the expression below represents the discounted price in dollars, based on x, the original price of the jacket.

Determine if the equation defines y as a function of x: 2xy = 1. yes o no