Answer & Step-by-step explanation:
a.) [tex]S=p+r[/tex]
The sum indicates addition
b.) [tex]D=b-a[/tex]
The difference between two numbers is the larger one minus the smaller one. We are told that b is greater than a, so b-a.
c.) [tex]A=\frac{k}{l}[/tex]
Average is found by using division
g.) [tex]y=x+x^2[/tex]
Sum indicates addition
:Done
