The answer choice is letter A!
While your statements are missing, there are a few things we can tell about the graph from the equation:
The vertex is at (3, -1). We know this because the equation is in vertex form,
y=a(x-h)²+k, where (h, k) is the vertex.
The graph opens upward and has a minimum. This is because there is no negative before the squared term.
The y-intercept of the graph is at (0, 8). We know this because if we substitute 0 for x, we have
y=(0-3)²-1 = (-3)²-1 = 9-1 = 8
Grandpa's age is 75 years
Seven times the age of junior = age of grandpa + 9 jears = 75 + 9 = 84 years
Hence, the age of junior will be 84 / 7 = 12 years. (Since 84 is seven times his age, you have to devide by seven).
--> Junior is 12 years old.
I hope I've been helpful, MarkV
Subtract the difference in age from the total:
87 - 15 = 72
Divide by 2:
72 / 2 = 36
Sydney is 36 years old
Devaughn is 15 years older: 36 +15 = 51 years old
51 + 36 = 87
