Answer:
Both equations have no solution.
Step-by-step explanation:
The first equation is:

Group the similar terms to get:


This equation has no solution because

The second equation is

We expand the parenthesis to obtain:


Group similar terms:


This equation does not also have solution because

Answer:
The correct answer is (5,3)
Step-by-step explanation:
I just did that one:)
Z = ( X - Mean ) / SD
z = ( 646 - 597 ) / 39
z = 49/39 = 1.25
With the z-score table:
for z = 1.25, p = 0.8944 ( probability that the cost will be lower than $646 )
1 - 0.8944 = 0.1056
Answer: <span>The probabilit</span>y is 0.1056