I would love to help! What's the question?
We can use the ratios for special triangles (see the attachment below). We'll be using the 45-45-90 triangle. We notice that side BC is equal to

, and side AC (x using the special right triangle) is equal to 16. We can therefore say that side BC is equal to

ft
:)
(-5-c)(-1)
can write as (-1)(-5-c)
multiply(-1) to (-5) then multiply (-1) to(-5)
answer 5+c
sin(43) × hypotenuse of 19 gives you oppo
= 13
Squared, so it is a parabola
leading coefieint (-4) is negative, so it opens down
it is concave down