Answer:
180 students have blue eyes
Step-by-step explanation:
If 18/40 students have blue eyes, when the total number rof students is 400
18/40 × 400=180
3(x+9)
3 multiply both x and 9
3x+27
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0.001
Answer: the last one
Step-by-step explanation: because 7 times 24 equals 168 and x would be 21 so 21 times 8 equals 168.