The sum of the first n multiples of nine greater than zero is given by the expression n/2(9n+9). Expand the equation by multiplying and then find the sum of the first fifteen multiples of nine greater than zero. I’ll give Brainliest!!

4. (10.03 mc) the equation of line cd is y = −2x − 2. write an equation of a line parallel to line cd in slope-intercept form that contains point (4, 5). (4 points) y = −2x + 13 y = negative 1 over 2 x + 7 y = negative 1 over 2 x + 3 − 2x − 3