Business and finance

 
4. 5(z + 1) = 3(z + 2) + 11 Solve for Z
a. 2
b. 4
c. 6
d. 12
5. The price of a book went up from $20 to $25. By how many percent did the price increase?
a. 5
b. 10
c. 20
d. 25
6. The price of a book decreased from $25 to $20. By how many percent did the price decrease?
a. 5
b. 10
c. 20
d. 25

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