The sum of angles of all triangles is 180
Step-by-step explanation:
2x + x + 57 = 90
3x = 33
x = 11
m1 = 2 × 11 = 22°
m2 = 11 + 57 = 68°
check: 22 + 68 = 90
The answer is <span>A –x^2 + 3x + 15
</span>
3x² + 6 – 2x + 5x – 4x²<span> + 9
Rearrange it:
</span>3x² + 6 – 2x + 5x – 4x² + 9
= 3x² - 4x² - 2x + 5x + 6 + 9
= -x² + 3x + 15
ANSWER
The maximum value is 625
EXPLANATION
The height of the stick that the bird dropped is modeled by the function;

This function is already in the vertex form.
Let me rewrite it clearly for you to see.

When we compare this to;

we have h=0 and k=625.
k=625 is the y-value of the vertex.
This is the maximum value on the graph of this function.