Answer:
see below
Step-by-step explanation:
1 B Answer :
[tex]7\times7\times7\times7\times7/7\times7\times7\times7=7[/tex] or [tex]7^{2+3}/7^{4} =7^{5-4} =7^{1} =7[/tex]
2 B Answer :
[tex]k^{4\times2} \times k^{5} =k^{8+5} =k^{13}[/tex]
3B Answer :
[tex]5a-15-a/1=5a-a-15=4a-15[/tex]
Hope that help
