Answer:
F(x) = -3(x + 2)² - 2
Step-by-step explanation:
In the picture attached, the graph is shown.
F(x) has the form a(x - h)² + k, where (h, k) is the vertex of the parabola. We can see in the graph that the vertex is located at (-2, -2), then F(x) = a(x + 2)² - 2. If a > 0 the parabola opens upward, if a < 0 the parabola opens downward. We can see in the graph that the parabola opens downward, then the correct answer is F(x) = -3(x + 2)² - 2
He made no gain
He bought 2 watches for $400
400/2=200
Each watch was $200
He gained 5% on one watch
200•1.05=210
He lost 5% on the other
200•0.95=190
210+190=400
Therefore he neither made nor lost any money
Answer:
4) 0.425, 17/40, 42.5%
5) 0.875, 7/8, 87.5%
Step-by-step explanation:
4) 17/40= 0.425, 17/40 is simplified to the lowest form already, and (0.425x100)x 1/100
5) 35/40=0.875, 35/40=7/8, and (0.875 * 100) * 1/100= 87.5%
i hope htis helps sorry if i got anything wrong