Find the equation of the parabola with its vertex at the origin and focus at (-3,0)

This is a horizontal parabola and the coordinates of vertex are ( 0, 0 ).
Also the coordinates of focus are: F ( -3, 0 )
so f = -3 and p = 2 f = 2 * ( - 3 ) = - 6
The formula is:
x² = 2 p y
x² = 2 * ( - 6 ) y = - 12 y

The equation of the parabola is: 
x² = - 12 y.

1.) 14 × ( 8 + 7 ) ÷ 6

Step-by-step explanation:

Sum of 8 and 7 = 8 + 7

14 times of sum of 8 and 7 = 14 × ( 8 + 7 )

And it Divided by 6 = 14 × ( 8 + 7 ) ÷ 6