Question 1 (5 points)
find the coordinates of the reflected image.
a triangle with vertices f(-1,9), g(-2, 1), and h(-7, 4) is reflected over the x-axis.
o
f'(-1,-9), g'(-2, -1), and h'(-7, -4)
o f"(-1,9), g (-2, 1), and h'(-7, 4)
of'(1,-9), g'(2, -1), and h'(7,-4)
o f'(-9, -1), g'(-1,-2), and h'(-4,-7)

A. F'(-1,-9), G'(-2, -1), and H'(-7, -4)

Step-by-step explanation:

A reflection over the x-axis has the rule

You are given a triangle with vertices F(-1,9), G(-2, 1), and H(-7, 4). After reflection the vertices of new triangle F'G'H' will have coordinates

See attached diagram for details.

practice. practice. practice.

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!