the point slope form of the equation of the line that passes through -5...
a - 2x-5y=-15
b - 2x-5y=-17
c - 2x+5y=-15
d - 2x+5=-17
C. 2x +5y = -15
You want the form ax +by = c. To get that form, you need to put the x-term on the left (making sure its sign is positive) and the constant on the right.
Multiply by 5:
5y +35 = -2(x -10)
5y +35 = -2x +20
2x + 5y = -15 . . . . . . corresponds to selection C
Be careful of dashes when writing answers. They can be confused with minus signs.
it is b. cause the equations are put in the right category
(n^3 - n)
since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number
if, n-1 is odd then n+1 is also odd, then it is a multiple of 9
but if, n-1 is even then n+1 is also even, then it is a multiple of 4
so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18