Step-by-step explanation:
it would be 45 if you add it as 21 but you didn't put another symbol hope I can help :)
Answer:
5a(c-2ab+6)
Step-by-step explanation:
5a is in all three, then factorise
122
286-42=144
144\2=122
122(peter)+164(malco)=286(total weight)
Answer:
1395 times.
Step-by-step explanation:
The Williams family open their door 28 + 17 = 45 times a day.
So in October they opened it 31 * 45 = 1395 times.
Answer:
6
Step-by-step explanation: