Solve the system of equations by the addition method.
A. (
, 
)
B. (
, 
)
C. infinite number of solutions
D. no solution
Answer: A
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Perform the matrix operation.Given A = 
and I = 
, find AI.
A. 
B. 
C. 
D. 
Match the following reasons to complete the proof.
m?3 + m?4 = 180° ________________________
Sketch the graph of the equation. Identify the vertex and the intercepts.y = x2 + 5x + 4
A. Vertex: 
;
x-intercepts: (-1, 0) and (-4, 0);
y-intercept: (0, 4)
B. Vertex: 
;
x-intercepts: (1, 0) and (4, 0);
y-intercept: (0, 4)
C. Vertex: 
;
x-intercepts: (-1, 0) and (-4, 0);
y-intercept: (0, 4)
D. Vertex: 
;
x-intercepts: (1, 0) and (4, 0);
y-intercept: (0, 4)
Solve the problem.An object is rolling with a driving force that suddenly ceases. The object then rolls 10 meters in the first second, and in each subsequent interval of time it rolls 80% of the distance it had rolled the second before. This slowing is due to friction. How far will the object eventually roll?
A. 12.2 m B. 50 m C. 20 m D. It will roll an infinite distance.