Answer:
See the step-by-step explanation
Step-by-step explanation:
Let c be any element of C. (I'm not sure wether you have to assume that C is non-empt or not)
C is a subset of B. That means that as c is in C, it is also in B. (
)
Now, B is a subset of A. It follows that as 
.
That means c is an element of A. The predicate Q is true for all elements of A, including c.
Because we let c be any element of C, we have proven that the predicate Q is true for all elements in C.
Answer:
(A)
Step-by-step explanation:
Kruger Motors Inc. deposited a check in the bank account. If the checks are written, then it is debited from the bank balance but when checks are deposited then it is credit (added) in the bank balance.
But the checks being deposited is not yet credited means that it has to be credited in the bank balance but till the it is being credited in the checkbook balance.
Hence, option (A) is correct. The amount is added to checkbook balance.
$ per min is a rate. you multiple by minutes to get dollars.
A = 10x
B = 5x + 20
set them equal to find minutes, x.
10x = 5x + 20
10x - 5x = 20
5x = 20
x = 4
