Mathematical expressions are numerical expressions without an equality (=) sign.
The value of the expressions are:
- [tex]\mathbf{5 - 7 = -2}[/tex].
- [tex]\mathbf{-5 + (-7) = -12}[/tex].
- [tex]\mathbf{-5 + 7 = 2}[/tex].
- [tex]\mathbf{-5- (-7) = 2}[/tex]
The expressions are given as:
[tex]\mathbf{a.\ 5 - 7}[/tex]
[tex]\mathbf{b.\ -5 + (-7)}[/tex]
[tex]\mathbf{c.\ -5 + 7}[/tex]
[tex]\mathbf{d.\ -5 - (-7)}[/tex]
[tex]\mathbf{a.\ 5 - 7}[/tex]
Express -7 as +(-7)
So, we have:
[tex]\mathbf{5 - 7 = 5 +(-7)}[/tex]
Evaluate
[tex]\mathbf{5 - 7 = -2}[/tex]
[tex]\mathbf{b.\ -5 + (-7)}[/tex]
Evaluate
[tex]\mathbf{-5 + (-7) = -12}[/tex]
[tex]\mathbf{c.\ -5 + 7}[/tex]
Evaluate
[tex]\mathbf{-5 + 7 = 2}[/tex]
[tex]\mathbf{d.\ -5 - (-7)}[/tex]
Open bracket
[tex]\mathbf{-5- (-7) = -5 + 7}[/tex]
Evaluate
[tex]\mathbf{-5- (-7) = 2}[/tex]
See attachment for the representation of each expression
Read more about expressions at:
https://brainly.com/question/20596193
