Solve the system by substitution. -4x + 8y = 56 x + 7y = 49
A. No solution
B. (0, 7)
C. (1, 6)
D. (-7, 0)
Answer: B
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Provide an appropriate response.Does replacing each occurrence of the variable in 
with its opposite result in the opposite of the polynomial? Why or why not?
What will be an ideal response?
The function graphed is of the form y = a sin bx or y = a cos bx, where b > 0. Determine the equation of the graph.
A. y = 2 cos 
B. y = 5 sin 
C. y = 5 sin (2x)
D. y = 5 cos (2x)
Solve the problem. Round to the nearest cent.If 31% of Karen's gross monthly salary results in total deductions of $648.07, then what is her gross monthly salary?
A. $2299.60 B. $4181.10 C. $1881.49 D. $2090.55
Determine whether the given function is one-to-one. If it is one-to-one, find a formula for the inverse.f(x) = 
A. f-1(x) = 
B. f-1(x) = (x + 3)2
C. Not one-to-one
D. f-1(x) = x2 - 3, x ? 0