Big Ideas Math Integrated I, 2016
BI
Big Ideas Math Integrated I, 2016 View details
1. Writing and Graphing Inequalities
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Exercise 23 Page 58

Substitute 5 into the given inequality and then simplify.

Yes

Practice makes perfect
We can determine whether 5 is a solution by substituting it into the inequality and simplifying using the order of operations.
20≤10/2z+20
20\stackrel{?}\leq\dfrac{10}{2\cdot{\color{#0000FF}{5}}}+20
20\stackrel{?}\leq\dfrac{10}{10}+20
20\stackrel{?}\leq1+20
20≤21
Since 20 is less than 21, 5 is a solution to the given inequality.