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单选题
Suzie’s Discount Footwear sells all pairs of shoes for one price and all pairs of boots for another price. On Monday the store sold 22 pairs of shoes and 16 pairs of boots for $650. On Tuesday the store sold 8 pairs of shoes and 32 pairs of boots for $760. How much more do pairs of boots cost than pairs of shoes at Suzie’s Discount Footwear?
A
$2. 50
B
$5. 00
C
$5. 50
D
$7. 50
E
$15. 00
参考答案
参考解析
解析：
设鞋子的单价为x，靴子的单价为y，则22x+16y=650,8x+32y=760，故x=15，y=20，两者相差$5，故本题选B项。
设鞋子的单价为x，靴子的单价为y，则22x+16y=650,8x+32y=760，故x=15，y=20，两者相差$5，故本题选B项。
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