Name: Sophia

Question:
what is 18m-11+ -7 (m = to 12)?



Hi Sophia,

The expression 18m-11+ -7 should be read

18 times m, minus 11, plus, minus 7. Since m is 12 this is 18 times 12, minus 11, plus, minus 7. 1812 = 216 so this is 216, minus 11, plus, minus 7. 216 - 11 = 205 and if you add -7 to 205 you get 198.

I hope this helps,
Penny

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