Please help also worth 10 points

A.

D= 1 wy

5

D = 1 wy (cross multiplication)

1 5

wy= 5D ( cancel y to get w)

wy = 5D

y = y

w=5D

y

(n^3 - n)

= n(n-1)(n+1)

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

a reflection across the x-axis , followed by the by a reflection across the y-axis , and then a scale dilation of 0.5 .