30. Answer if u place the equation into a fraction: example 20/8 yellow over red. Next let’s put the other amount into a fraction, we don’t know yellow so for the fraction we will put x: x/18. For our next step we will then cross multiply 20 by 18 and 8 by x getting 8x=360 from there you divide for x getting 45 yellow.
D has the commutative property because it just flip flopped the numbers.
Irrational would be the correct answer
12s - 20 < 3s - 25 |+20
12s < 3s - 5 |-3s
9s < -5 |:9
s < -5/9
Answer: Any number from the set (-∞, -5/9).
