Answer:

Step-by-step explanation:

multiply constants and add the exponents

Answer:
The first one is x=2 and the second one is x=2/5 or 0.4
Step-by-step explanation:
(x + x² + 4x) 3
3(x) + 3(x²) + 3(4x)
3x + 3x² + 12x
Answer:
33.18
Step-by-step explanation:
Use law of sines.
x / sin(65°) = 21 / sin(35°)
x = 21 sin(65°) / sin(35°)
x ≈ 33.18