If you do it 144 times that is (3+9)*12
This means that 12 times 3 red and 9 blue counters will be chosen that means that 9 blue counters will be chosen 12 times. 9*12 is 108.
This means blue counters will be chosen 108 times.
This can be checked as 108/3 would give you the number of red counters which is 36 and 108+36 is 144
25% = 1/4
So to get the unknown number, multiply 9 by 4:
9 × 4 = 36
Answer:
.
Step-by-step explanation:
0.85x + 375 > 450
