Modeling with Two-Variable Linear Inequalities — Quiz
Question 4 • Mathematics I
Jamaal spent x minutes today practicing his guitar and y minutes today on homework. If the total time he spent on both is 45 minutes or more, which inequality best represents his practice time?
Answer
A
x plus y is less than 45
B
x plus y is greater than or equal to 45
C
x plus y is greater than 45
D
x plus y is less than or equal to 45
Explanation
Add the time Jamaal spent practicing and doing homework: x + y. “45 minutes or more” means the total can equal 45 or be greater than 45, so x + y ≥ 45. The best choice is “x plus y is greater than or equal to 45.”
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