First combine like terms (-9n-3n=-12n)
Then, subtract 6n on both sides (to get rid of the 6n) = -18n
Then, add 8 to both sides (does not matter) = 0
Finally divide (answer is 0)
As said before, 160 is the correct answer
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![(4a+7b-12c)-(8a-9b+12d)\\4a+7b-12c-8a+9b-12d](https://tex.z-dn.net/?f=%284a%2B7b-12c%29-%288a-9b%2B12d%29%5C%5C4a%2B7b-12c-8a%2B9b-12d)
Negative multiply negative = Positive
Negative multiply positive = negative
![-8a+4a+9b+7b-12c-12d\\-4a+16b-12c-12d](https://tex.z-dn.net/?f=-8a%2B4a%2B9b%2B7b-12c-12d%5C%5C-4a%2B16b-12c-12d)
Thus the answer is -4a + 16b - 12c - 12d.
Answer:
P(A)=0.55
P(A and B)=P(A∩B)=0.1265
P(A or B)=P(A∪B)=0.7635
P(A|B)=0.3721
Step-by-step explanation:
P(A')=0.45
P(A)=1-0.45=0.55
P(B∩A)=?
P(B|A)=0.23
P(B|A)=(P(A∩B))/P(A)
0.23=(P(A∩B))/0.55
P(A∩B)=0.23×0.55=0.1265
P(A∪B)=P(A)+P(B)-P(A∩B)
=0.55+0.34-0.1265
=0.7635
P(A|B)=[P(A∩B)]/P(B)=0.1265/0.34 ≈0.3721