For the first one y= -1 but idk how to do the others sorry
Answer:
0.53%
Step-by-step explanation:
hope it is well understood
Answer:
27
Step-by-step explanation:
Evaulate 9÷3[(20-7) -2to the power of 2]
9÷3[(20-7) - 2²]
9 ÷ 3 = 3
[(20-7) - 2²] = (13 - 4) = 9
Hence ;
9÷3[(20-7) - 2²]
3(9)
= 27
C because its a lot cheaper and it will e more beneficial