3
Use graphs to determine whether sin +
- cos could possibly be an identity or is definitely not an identity,
2
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Hox
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you'll just earn points here

step-by-step explanation:

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation:

sounds & other waves originate from any vibrating object

parallelogram is the   answer