Answer: [tex]900[/tex]
Multiply
[tex]-18*-10=180[/tex]
Multiply
[tex]180*5=900[/tex]
Note
Multiplying/Dividing a negative to a positive will equal a negative. (N×P=N)
Multiplying/Dividing a negative to a negative will equal a positive. (N×N=P)
Multiplying/Dividing a positive to a positive will equal a positive. (P×P=P)