Ok 1st for the triangles you multiply the base X height then multiply by two. For EX: 5x10=50/2=25 so that's the answer for your first triangle.
Answer:
D. 19
Step-by-step explanation:
f(x) = x² + 3
f(-4) = (-4)² + 3
f(-4) = 16 + 3
f(-4) = 19
Answer: 19