Question

Lorenzo plans to purchase three identical shirts. The shirts are on sale for 20% off. Let c represent the cost of each shirt. Which expressions can Lorenzo use to calculate his total cost for the three shirts after the discount?
Select each correct answer.


A. 0.80(3c)

B. 3c−0.20(3c)

C. 3(c−0.20c)

D. 1.20(3c)
please help

Answer 1

Answer:

Options A, B and C are correct choices.

Step-by-step explanation:

Let c represent the cost of each shirt.

As Lorenzo bought 3 shirts, so the cost of 3 shirts will be 3c.    

We have been given that the shirts are on sale for 20% off, so the total cost of three shirts after discount will be 3c minus 20% of 3c.

We can represent this information in an equation as:

$\text{Total cost for the three shirts after the discount}=3c-(\frac{20}{100}\times 3c)$

$\text{Total cost for the three shirts after the discount}=3c-(0.20\times 3c)$

$\text{Total cost for the three shirts after the discount}=3c-0.60c$

$\text{Total cost for the three shirts after the discount}=2.40c$

Let us see our given choices one by one.

A. 0.80(3c)

Upon simplifying our given expression we will get,

$0.80(3c)=2.40c$

Therefore, option A is a correct choice.

B. 3c−0.20(3c)

We have already seen that total cost of 3 shirts after discount will be 3c minus 20% of 3c and after simplifying our expression we will get,

$3c-0.20(3c)=3c-0.60c=2.40c$

Therefore, option B is a correct choice as well.

C. 3(c−0.20c)

Upon simplifying our given expression we will get,

$3(c-0.20c)=3c-0.60c=2.40c$

Therefore, option C is a correct choice as well.

D. 1.20(3c)

Upon simplifying our given expression we will get,

$1.20(3c)=3.60c$

Since total cost of 3 shirts after discount is 2.40c, therefore, option D is not a correct choice.

Answer 2

A. 0.80(3c)
B. 2c-0.20(3c)
C. 3(c-0.20c)

I'm 100% sure that these are the answers. ♡