What 1/12 + (-7/12) I need help pls

Hillel is juggling flaming torches to raise money for charity. his initial appearance raises $500\$500 $500 , and he raises $15\$15 $15 for each minute of juggling performance. the amount rr r of money hillel raises is a function of tt t , the length of his performance in minutes. write the function's formula.

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180

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