Find the value of $5+k$5+k when $k=9$k=9.
Find the value of $z+2$z+2 when $z=-7$z=−7.
Find the value of $m+n$m+n when $m=6$m=6 and $n=-4$n=−4.
Find the value of $5+a+b$5+a+b when $a=-7$a=−7 and $b=4$b=4.
Solve problems involving operations with positive and negative fractions and mixed numbers, including problems involving formulas, measurements, and linear relations, using technology when appropriate.