Question

Jack has ordered sandwiches for himself and his 4 friends from an online mobile application. He got a discount of $2.8. Write the algebraic expression for the amount to be paid (in dollars)?

• A. $5\text{x}-10$
  
• B. $5\text{x}+10$
  
• C. $5\text{x}-10$
  
• D. $\text{x}+5-10$
  

Answer 1

The correct option is A $5\text{x}-10$


Let the price of each sandwich be $\$\text{x}$
Total number of persons = 5

Hence, The original cost of sandwiches for 5 persons = the price of each sandwich $\times$ total number of person
$=\text{x}\times 5=5\text{x}$

Given, discount = $\$10$

Amount to be paid = The original cost of sandwiches for 5 persons - Discount amount
$=(5\text{x}-10)\$$