Find the slope and the y-intercept.x = 1
A. m = 1; b = 0
B. m is undefined; b = 1
C. m = 0; b = 1
D. m is undefined; no y-intercept
Answer: D
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Add or subtract as indicated. Simplify the result whenever possible. Write any answer that contains an improper fraction as a mixed number. 
- 
A. 
B. 
C. 
D. 
In the figure, 
is a right angle. Find the value of sin A (also known as sin 
).
A. 
B. 
C. 
D. 
Simplify the algebraic expression by collecting and combining like terms.-5x + 2x
A. -10x B. -3x C. -7x D. -3 + x
Solve the problem.A mathematician has found 5 solutions to a homogeneous system of 40 equations in 42 variables. The 5 solutions are linearly independent and all other solutions can be constructed by adding together appropriate multiples of these 5 solutions. Will the system necessarily have a solution for every possible choice of constants on the right side of the equation? Explain.
What will be an ideal response?