Answer:
a) If a=20 the system has no solutions.
b) If a≠20 the system has exactly one solution.
Step-by-step explanation:
The augmented matrix of the system is .
Using rows operations we obtain the echelon form of the matrix, ie,
Since the echelon form of the matrix does not have free variables then the problem has exactly one solution or has no solutions.
a) If a=20 the system has no solutions because in the last equation solving for x3 it has that 0=24. Then the system is inconsistent.
b) If a≠20, the the system has exactly one solution that is obtained solving the system of the echelon form matrix.
The answer to this equation is x=-2.5
The correct answer is 0.96
Answer:
Theodore's
the interest rate in Theodore's bank is higher
Step-by-step explanation:
A rational investor would want to invest in a bank that offers a higher interest rate because more money is usually preferred to less money.
If the same amount, 1500 was deposited in both banks,
interest in Theodore's bank after 4 years = 1500 x 0.042 x 4 = $252
$252 would be preferred to the $216 earned at Bella's bank
The answer is B. The line is horizontal. If the line was a regular diagonal slope line with a slope of 1, 2, etc., the answer would be A. If the slope was undefined, the line would be vertical. Since the slope is 0, the line doesn't increase in height or have a slope at all. It is simply a straight, horizontal line.
I hope this helps :)