The ozone layer, I'm pretty sure.
The possible values for the missing number that make the given expression the square of a binomial is; 81
<h3>Binomial Expression</h3>
We are given the expression;
x² + 18x
- Now, if we consider the binomial; x ± b
Squaring that gives us;
x² ± 2ax + b²
Comparing this expression to the one we are given we can say that;
±2ax = 18x
±a = 18/2
a = ±9
Thus,we will have;
(x + 9)² as our expression which is;
x² + 18x + 81
Therefore, the missing number is 81.
Read more on binomial expression at; brainly.com/question/14968861
Answer:
yes clean air is good for people i highly doubt you want nasty air up in your lungs
Explanation:
reasons why is because you can get really really sick.
Answer:
The inequality symbol is incorrect because she can spend up to and including $65.
The expression 5. 50b + 7. 5 is correct because $5. 50 per book is 5. 50b and that is added to the shipping fee of $7. 50 to determine the total purchase price.
Explanation:
The inequality should be 5.50b + 7.5 ≤ 65 because she can use less than $65 or all $65 to spend on books.
Also, the shipping fee is for all the books she buys combined, not for each individual book so the left side of the inequality should read 5.50b + 7.5.
