Hailey just had lunch at the Sushi Palace, and she wants to leave an 18% tip. She writes the expression b + 0.18b to compute her bill with a tip, where b is her bill before the tip.
Which expression is equivalent to Hailey's expression?
1.18b
0.18(2b)
1.18(2b)
2(1.18b)
After lunch, Hailey goes to the pet store. Suppose Hailey buys 5 guinea pigs at 20% off the original price of g dollars per guinea pig, which expression will NOT give Hailey's total cost?
4g
5g-0.20
5g-0.2(5g)
5g-1g
The expression that is equivalent to Hailey's expression b + 0.18b is 1.18b.
The expression that will NOT give Hailey's total cost for 5 guinea pigs at 20% off the original price is 5g-1g.