F(x)=250+40x
x=number of weeks.
if x=6; then:
f(6)=250+40(6)=250+240=490
Answer: Rosa would save $490.
9514 1404 393
Answer:
Vertex: (-1, 4)
Maximum: f(-1) = 4
Increasing: (-∞, -1)
Decreasing: (-1, ∞)
Step-by-step explanation:
The equation can be written in vertex form by "completing the square."
First factor out the leading coefficient from the x-terms.
f(x) = -(x² +2x) +3
Then add the square of half the x-coefficient inside parentheses. Add the opposite of that amount outside parentheses.
f(x) = -(x² +2x +1) +3 +1
Write in vertex form.
f(x) = -(x +1)² +4 . . . . . . . compare to a(x -h)² +k
You can see that the vertex is (h, k) = (-1, 4), and that the vertical scale factor 'a' is negative. This means the vertex is the maximum and the parabola opens downward.
The function will be increasing to the left of the maximum, decreasing to its right.
__
Vertex: (-1, 4)
Maximum: f(-1) = 4
Increasing: (-∞, -1)
Decreasing: (-1, ∞)
Graph: see attached
Investment at 2% is 22,000
Investment at 3% is 13,000
Answer:
C. For every 4 giraffes in the zoo, there are 10 monkeys
Step-by-step explanation:
The ratio of the number of giraffes to the number of monkeys in a zoo = 2 : 5
giraffes : monkeys
4 : 10
4/2 : 10/2
2 : 5
So, For every 4 giraffes in the zoo, there are 10 monkeys