222k views
0 votes
Which expression is positive? I will send you a screenshot of that number line I am having difficulty with.

Which expression is positive? I will send you a screenshot of that number line I am-example-1

1 Answer

7 votes

Solution:

Given:

A number line.

To get the expression that is positive, we estimate the values of the points on the number line.


\begin{gathered} Assume\text{ }a\approx-1.8 \\ \\ Hence, \\ -a-1=-(-1.8)-1 \\ =1.8-1 \\ =0.8 \\ \\ This\text{ gives a positive result} \end{gathered}

Also, for the other expression,


\begin{gathered} Assume\text{ }b\approx2.5 \\ \\ Hence, \\ -b+2=-2.5+2 \\ =-0.5 \\ \\ This\text{ gives a negative result} \end{gathered}

Therefore, the expression that is positive is -a -1

OPTION A is correct.

User Rheeantz
by
8.1k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories