When x=42 that means it is 8x6 so that means that the y = 120 becuase its 20x6
answer= y=120
Answer:
Step-by-step explanation:
i). 

= 8a²
ii).
= 
= 
= 9a²b²c²
Answer:
1. 73
2.-63
Step-by-step explanation:
1. 30+43=73
2. -84+21= 21-84=-63
Answer:
x=2.2
Step-by-step explanation: