Simplify
(+8)-(-4)+(-5)​

The circumference of a circle is 5 pi cm. what is the area of the circle?

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles

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