I’m pretty sure 2 and 5/7 as an improper fraction is 19 but I’m not sure since on your question it doesn’t show 19 as an answer.
Answer:
I suggest you use Socratic, it solves questions like this.
Step-by-step explanation:
$76.50 - $8.50 = 9 weeks
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Step-by-step explanation:
20 x 399 x 5
= (20×5) × 399
= 100×399
= 39,900