Nina completed a third of her homework problems. but one half of all the problems she solved had incorrect answers. if 7 of the problems she solved had correct answers, then how many problems are in her homework?

noncoplanar points are points that do not lie on the same line.

60: 45 =12: 9 =4: 3 so the answer is 4: 3

let's first notice, the center of the hyperbola is at the origin, since the focus points are equidistantly 3 units away from the origin, that also means that the distance "c" from the center to either focus is 3.

it should also be notable that, the traverse axis for this hyperbola is vertical, or namely over the y-axis and therefore, the positive fraction will be the one with y-variable.

the traverse "a" component or distance from the center to either vertex is not 2, is more than 2, so we can safely put it at √5 ≈ 2.24.

answer is

b.

11

hope you get this one right.