Answer: 6 book set = 69.95
Step-by-step explanation:
6 separate books = 14.95 = 6x14.95= 89.70
69.95<89.70, 6 book set is a better deal
so h = 7, k = -2, meaning the vertex is at (7, -2).
the squared variable is the "y", meaning is a horizontal parabola.
the "p" distance is negative, for a horizontal parabola that means, it's opening towards the left-hand-side.
we know the focus and directrix are "p" units away from the vertex, and we know the parabola is opening horizontally towards the left-hand-side.
the focus is towards it opens 1 unit away, at (6, -2).
the directrix is on the opposite direction, 1 unit away, at (8, -2), namely x = 8.
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S is 30 degrees :) triangles are 180 degrees and you already know the measure of two, so if you add 85+65 you get 150. the. you subtract 180-150 and you get 30!