What is the result of subtracting the second equation from the first?
8x – 4y = -4
- 3x + 4y = 5

first, you divide the triangle in two, tô form a retangle triangle. after, using pythagoream theorem:

18^2 = 14^2 + (x/2)^2

(x^2/4) + 196 = 324

x^2/4 = 324 - 196

x^2/4 = 128

x^2 = 512

x = √512

x = √2^9

x = 16√2 cm

i hope i you.

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step-by-step explanation:

this is a parabola.