Ten more than the product two a number

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

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