Answer:
The solutions of the equation x^2-1=-x^2+7 are (-2,3) and (2,3)
Step-by-step explanation:
Please, see the attached file.
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Answer:
Girls: 45
Boys: 25
Step-by-step explanation:




Awnser Check:

Answer:
325 + 100*M = D
Step-by-step explanation:
initial amount + savings per month * months = total amount in account
325 + 100*M = D
The answer would be 120 degrees