The total cost (t) after8% sales tax is added to an items price(p)

Find the roots of the equation below. x^2 - 6 + 9 = 0

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

What is the answer to this question? i'm a bit stumped. also how do i do it? 5(x - 4) = 2(x + 5)