Pllleaaasssee :

1) write a translation rule that maps point d(7, –3) onto point d'(2, 5).

2) triangle abc has coordinates a(1, 4); b(3, –2); and c(4, 2). find the coordinates of the image a'b'c' after a reflection over the x-axis.

any would be appreciated. i have a hard time with this stuff. : -)

Okay, well first look at the graph of the point "D". A translation from (7, -3) to (2, 5) is a movement of 8 units up, and 5 units left. So the conversion factor is (8, -5).

Now, I understand the points of the triangle are at (1, 4) (3, -2) and (4, 0). To reflect across the x-axis, to do this, merely flip the signs of the y-values of the coordinates.

A(1, 4) = A'(1, -4)
B(3, -2) = B' (3, 2)
C(4, 0) = C'(4, 0)

And that's all folks!

20 is the answer because if there is a boy ratio of 80% then there would be a girl ratio of 20%.