John went to the Department Store and bought 9 pieces of notebook and 4 pieces of ballpen. If each ballpen costs Php 18, then how much is the notebook if he paid at most Php 500.
What is the symbol representation for the word "at most"? (You are allowed to type your answer in words)
What is the symbol representation for the word "at most"? (You are allowed to type your answer in words)
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In the given problem, apply your knowledge in algebraic expression and basic mathematics specially in solving unknown variables.
Given:
9 pieces of notebook
4 pieces of ballpen
each ballpen costs Php 18
he paid at most Php 500
Solution:
Let x – notebook, and
y – ballpen
Cost = price(notebook) + price(ballpen)
= x(9) + 18(4)
9x + 72 ≤ 500
9x ≤ 500 - 72
9x ≤ 428
x ≤ 438/9
x ≤ 47.56
How much is the notebook?
Since the condition of inequality is at most (less than of equal) do not round off 47.56 to 48.
Answer: Php. 47
Linear Inequality statement
At most means less than or equal to
47x + 18y ≤ 500
Learn more about linear inequality and how it differ from linear equation here at
brainly.ph/question/7977601
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Step-by-step explanation:
Credits Answer:jordanrealin