Answer:
it the same number.
Step-by-step explanation:
1) 2a = 9b ⇒ 2:9
2) a + b = 3b ⇒ a = 2b ⇒ 1:2
Answers: 2:9 and 1:2
the answers are
8x+25y≤600
x > 0
y≥20.
784