Part A Ms. Blue bought 9 folders and 9 notebooks. The cost of each folder was $2 and each notebook cost $4. Write two equivalent expressions Part B:Ms. Blue bought 9 folders and 9 notebooks. The cost of each folder was $2 and each notebook cost $4. find the total cost.

step-by-step explanation:

the answer is 128

t= half of the arc subtended by t.

r= half of the arc subtended by r.  

t+r= half of the arc subtended by t + half of the arc subtended by r= half of 360=180

step-by-step explanation:

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