Answer:
5a) see work below
5b) false
6) a = 1, b= -1
Step-by-step explanation:
work in picture attached
Answer:
600
Step-by-step explanation:
That's a quadratic, a nice parabola in vertex form.
The parabola has a positive x^2 term, so it's a CUP, concave up positive. It will have a minimum at the vertex, which is (2,5). Plot that point.
Now we need a couple of guide points to draw the usual parabola going up from both sides of its vertex. We try x=0 giving (0,9) and see that x=4 also gives 9, (4,9). Plot the parabola through those two points and the vertex and you're done.
Answer:
what number?
number three or number two