Find center, vertex and focus of hyperbola 9x^2 + 18x - 4y^2 + 16y = 43

In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4

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The number of 8th graders who responded to a poll of 6th grade and 8 th graders was one fourtg of the number of 6th graders whi responded if a total of 100 students responddd to the poll how many of the students responded were 6 th graders