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Based on the model [tex][tex]$y=0.8x$[/tex][/tex], if the store sold 100 cell phones, how many cell phone cases did it sell?

A. 40
B. 80
C. 100
D. 50

Sagot :

GinnyAnswer
Sure! Let's walk through this step by step.

We are given the model:

[tex]\[ y = 0.8x \][/tex]

where:
- [tex]\( x \)[/tex] represents the number of cell phones sold, and
- [tex]\( y \)[/tex] represents the number of cell phone cases sold.

In this scenario, it's mentioned that the store sold 100 cell phones. So, we have:

[tex]\[ x = 100 \][/tex]

Now, we need to find how many cell phone cases were sold. To do this, we substitute the value of [tex]\( x \)[/tex] into the model equation:

[tex]\[ y = 0.8 \times 100 \][/tex]

Multiply 0.8 by 100:

[tex]\[ y = 80 \][/tex]

Therefore, the store sold 80 cell phone cases. So, the correct answer is:

B. 80
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