Answer: can't get enough info.
a = 11
Step-by-step explanation:
a + 15 = 3a - 7
-a -a
15 = 2a - 7
+7 +7
22 = 2a
/2 /2
11 = a
Answer:
(4, -1) is not a solution to the system
Step-by-step explanation:
The first point: (4,-1) doesn't satisfy the first inequality:

since we get to an absurd, because -1 cannot be strictly smaller than -1!
Answer: 2.093
Step-by-step explanation: just took it
P(A U B) = P(A) + P(B) - P(A and B)
P(A | B) = P(A and B) / P(B)