Solve the system by using Gaussian elimination with backward substitution or by reducing the matrix to reduced-row echelon form.4x + 4y + z = 154x - 5y - z = -14x + y + 3z = 7
A. No solution
B. (-1, 2, 2)
C. (2, 2, -1)
D. (2, -1, 2)
Answer: C
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Provide an appropriate response.Choose the false statement from those below:
A. -2 is an element of the set of real numbers. B. -2 is an element of the set of natural numbers. C. -2 is an element of the set of rational numbers. D. -2 is an element of the set of integers.
Solve using Cramer's rule.2x + 5y = 73x + y = -9
A. (3, -4) B. (-3, -4) C. (-4, 3) D. (4, -3)
Divide. Simplify, if necessary.
÷ 2
A. 
B. 8
C. 
D. 
Two planes take off at the same time from an airport. The first plane is flying at 250 miles per hour on a bearing of 
. The second plane is flying in the direction 
at 275 miles per hour. If there are no wind currents blowing, how far apart are they
after 2 hours? Apply the rules regarding the use of significant digits when determining your answers.
?
__________ mi
?
What is the bearing of the second plane from the first after 2 hours?
?
__________ 
__________
__________
What will be an ideal response?