Answer: 330
Step-by-step explanation:
Quite simple when you take out the useless stuff you added in. Its 16
1000m equals 1km so 600m equals 0.6km.
9x²- 25
3x(3x) = 9x²
3x(5) = 15x
-5(3x) = -15x
-5(5) = -25
9x² + 15x - 15x - 25
9x² - 25 is your answer
hope this helps