How do you solve for x?
1953=x(x+1)/2

50 points! antonio made a scale model of a building. the model's scale is 1 inch to 235 feet and its height is 3.5 inches. what is the exact height of the actual building? enter your answer in the box.

Which of the following lines is parallel to x=4? a- 3y=9 b- y=4 c- x=2 d- x=y answer this as soon as possible xoxo lo ; )

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12