2/3 • 1/5 = 2/15
'of' always means multiplication.
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This problem is odd in that no information is given regarding the relationship, if any, between x and y, and (more importantly) x can't have both values -15 and 21. Please go back and ensure that you have copied down this problem precisely as it was given you.
Answer:
Step-by-step explanation:
12 x 8% = .96 (tax)
So 12 + .96 = $12.96 total