The answer for your question is 10.46
Answer:
ok, you need to make the top point (1,10) move to (4,-2)_ which you have. now take the other points and make them correspond with the new triangle. as for the 1/3....im not to sure myself, did your teacher tell you how to do that?
Step-by-step explanation:
F(x)= 7 x² + 42 x = 7 ( x² + 6 x ) = 7 ( ( x² + 6 x + 9 ) - 9 ) =
= 7 ( x + 3 )² - 63 (vertex form)
Answer: D)