AnswersFL-1200310-Algebra 1Solving Systems of Linear Equations: Linear Combinations

Solving Systems of Linear Equations: Linear Combinations Answers

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At what value of x do the graphs of the equations below intersect?2x − y = 65x + 10y = −10

A
Option
Option A
B
−2
C
2
D
Option
Option D
2
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Which statement is true about the equations –3x + 4y = 12 and x – y = 1?

Question illustration
A
The system of the equations has exactly one solution at (–8, 3).
B
The system of the equations has exactly one solution at (–4, 3).
C
The system of the equations has no solution; the two lines are parallel.
D
The system of the equations has an infinite number of solutions represented by either equation.
3

To eliminate the y-terms and solve for x in the fewest steps, by which constants should the equations be multiplied by before adding the equations together?First Equation: 5x − 4y = 28Second equation: 3x - 9y = 30

A
The first equation should be multiplied by 3 and the second equation by 5.
B
The first equation should be multiplied by 3 and the second equation by −5.
C
The first equation should be multiplied by 9 and the second equation by 4.
D
The first equation should be multiplied by 9 and the second equation by −4.
4

To eliminate the x terms and solve for y in the fewest steps, by which constants should the equations be multiplied by before adding the equations together? First equation: Second equation:

Question illustration
A
The first equation should be multiplied by 3 and the second equation by -5.
B
The first equation should be multiplied by 3 and the second equation by 5.
C
The first equation should be multiplied by 7 and the second equation by -6.
D
The first equation should be multiplied by 7 and the second equation by 6.
5

A small fruit basket with 6 apples and 6 oranges costs $7.50. A different fruit basket with 10 apples and 5 oranges costs $8.75. If x is the cost of one apple and y is the cost of one orange, the system of equations below can be used to determine the cost of one apple and one orange.6x+6y=7.5010x+5y=8.75

A
0.25
B
0.5
C
0.75
D
1.00
6

The system of equations is solved using the linear combination method.What does 0 = −12 mean regarding the solution to the system?

Question illustration
A
There are no solutions to the system because the equations represent parallel lines.
B
There are no solutions to the system because the equations represent the same line.
C
There are infinitely many solutions to the system because the equations represent parallel lines.
D
There are infinitely many solutions to the system because the equations represent the same line.
7

Which statement describes the graph of the system of equations below?1.5x + 0.2y = 2.681.6x + 0.3y = 2.98

A
The lines are parallel.
B
The lines overlap at all points.
C
The lines intersect at (1.6,1.4).
D
The lines intersect at (3.1,0.5).

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