Arianna bought 16 postcards during 4 days of vacation. How many days will Arianna have to spend on vacation before she will have
1 answer:
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Step-by-step explanation:
is this the question you asked
Answer:
Step-by-step explanation:
So we know that:
To reflect across the <em>y-axis</em>, instead of x, use -x. Therefore:
Simplify:
And that's our answer :)