120, BODMAS. Multiplication is done before subtraction
The answer is 120, by applying bodmas rule, Multiplication is done before subtraction so, 230 - 220 x 0.5 = 230-(220*0.5) =230-(110) =120 or 5!
230 - 220 x 0.5 = 230-110=120
Solve for x in the following quadratic equation and you will have discovered the beautiful time-honored Golden Ratio: X^2 + X -1 = 0
Hint: Quadratic Formula
A square is in the first quadrant, as shown, with its sides extending to points on the x-axis of (3, 0), (5, 0), (7, 0) and (13, 0). What is the area of the square?
