UC知道问一道SAT数学题目
来源：百度知道 编辑：UC知道 时间：2024/06/10 01:36:16
Two enterprising college students decide to start a
business. They will make up and deliver helium balloon
bouquets for special occasions. It will cost them
$39.99 to buy a machine to fill the balloons with
helium. They estimate that it will cost them $2.00 to
buy the balloons, helium, and ribbons needed to make
each balloon bouquet. Which of the following expressions
could be used to model the total cost for producing
b balloon bouquets?
A. $ 2.00b + $39.99
B. $37.99b
C. $39.99b + $ 2.00
D. $41.99b
E. $79.98b
business. They will make up and deliver helium balloon
bouquets for special occasions. It will cost them
$39.99 to buy a machine to fill the balloons with
helium. They estimate that it will cost them $2.00 to
buy the balloons, helium, and ribbons needed to make
each balloon bouquet. Which of the following expressions
could be used to model the total cost for producing
b balloon bouquets?
A. $ 2.00b + $39.99
B. $37.99b
C. $39.99b + $ 2.00
D. $41.99b
E. $79.98b
A
$39.99 is the cost of the machine
$2.00 is the cost of each balloon
b balloons cost $2.00b
Add them all
you can get A
A....
机器只要一个
每一个气球2块,b个就是2b块
加起来就是2b+39.99....
A.
机器39.99DOLLARS
每个气球另加2DOLLARS
就是这个意思...
答案是A。
原因如下：
1.$39.99是用来买那个给气球充气的机器用的，而买到一个机器，可以给很多个气球充气，不需要每充一个气球买一台机器，因此，这$39.99不需要乘以b这个系数。
2.每个气球要$2.00，因此b个气球就要$2.00*b。
将上面两个数据相加就是答案A了。