单项选择题

A sub sandwich and a soda at a basketball game’s concession stand costs $3.40. A family purchases three sub sandwiches and two sodas, and the total cost is $9.10. What is the cost of a soda

A. $1.00
B. $1.10
C. $1.15
D. $1.20
E. $1.40
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单项选择题
A department store ran an advertisement in the paper, stating that 17% of the cost of a provided grocery bag of items would be deducted at the cash register. If an individual placed $180 worth of merchandise in the bag, what would be the discounted price of the items, before taxes (rounded to the nearest dollar)
A. $144
B. $149
C. $156
D. $163
E. $168
单项选择题
For senior class pictures, a photographer charges x dollars to make a negative,dollars for each of the first 20 prints, and dollars for each print in excess of 20 prints. If $80 is the total charge to make a negative and 30 prints, what is the value of x（）

A. 3
B. 4
C. 5
D. 6
E. 7
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