Respuesta :

[tex]1. \: = > 4( - 7) \\ = 4 \times - 7 \\ = - 28[/tex]

[tex]3. \: = > 9( - 12) \\ = 9 \times - 12 \\ = - 108[/tex]

[tex]4. \: = > - 6( - 8.75) \\ = 6 \times 8.75 \\ = 52.5[/tex]

[tex]5. = > 27( - 3) \\ = 27 \times - 3 \\ = - 81[/tex]

[tex]7. \: = > - 55(0) \\ - 55 \times 0 \\ = 0[/tex]

[tex]8. \: = > ( - 7)( - 7.25) \\ = 7 \times 7.25 \\ = 50.75[/tex]

[tex]11. \: = > ( - 1) {}^{4} \\ = 1 {}^{4} \\ = 1[/tex]

[tex]13. = > 42 \div ( - 7) \\ = - (42 \div 7) \\ = - 6[/tex]

[tex]15. = > - 9 \div 3 \\ = - (9 \div 3) \\ = - 3[/tex]

Solved ✔︎

1. -28 2. -77 3. -108 4. 52.5 5. -81 6. 143 7. 0 8. 50.75 9. -78 10. -27 11. 1 12. 64 13. -6 14. -9 15. -3 16. 8 17. 3 18. -11 hope this helped :)