Answer:
14/6, and on and on just multiply the numerator by 2, and the denominator by the same number
Step-by-step explanation:
Answer:
(12+3x)x
Step-by-step explanation:
the other 3 can be simplified into 15x, but (12+3x)x = 12x+3x^2
Solution :
a).
Now, if X = Y, then :
Then, E[X|Y] = x = y
So,
= 0
Therefore, this statement is TRUE.
b). If X = Y , then Var (X) = Var (Y)
And as Var (X|Y) = 0, so Var (X|Y) ≠ Var (X), except when all the elements of Y are same.
So this statement is FALSE.
c). As defined earlier,
So, this statement is also TRUE.
d). The statement is TRUE because .
e). FALSE
Because,
Answer:
x ≥ 88
Step-by-step explanation:
In order to have at least an average of 80 after 4 tests, the sum of her scores must be at least 80 * 4 = 320 so we can write the following inequality:
71 + 78 + 83 + x ≥ 320
232 + x ≥ 320
x ≥ 88
A contrapositive is a statement that negates and interchanges the hypothesis and conclusion of a conditional statement.
Conditonal Statement:
If I go to work, the roads are clear.
Contrapositive (Of the conditional statement):
If the roads are not clear, I will not go to work
To form that contrapositive I negated both the hypothesis and conclusion, and then interchanged them.