Solve the system by graphing.
x - 
y = 5
x + 
y = 12
A. {(3, 4)}
B. {(3, 1)}
C. {(4, -3)}
D. {(4, 3)}
Answer: D
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Determine what the next equation would be, and verify that it is indeed a true statement.5 × 6 = 7 × 8 - (5 + 6 + 7 + 8)6 × 7 = 8 × 9 - (6 + 7 + 8 + 9)
A. 8 × 9 = 10 × 11 - (8 + 9 + 10 + 11) B. 7 × 8 = 9 × 10 - (5 + 6 + 7 + 8 + 9 + 10) C. 8 × 9 = 10 × 11 - (7 + 6 + 5 + 4) D. 7 × 8 = 9 × 10 - (7 + 8 + 9 + 10)
Find the inverse of the function.f(x) = - 
A. f-1(x) = -1x
B. f-1(x) = - 
C. f-1(x) = - 
D. f-1(x) = 
For the given function expressed verbally, give a symbolic representation.Surveyors use the "link" as a unit of measure. To convert x inches to y links, divide x by 7.92. Let y = f(x).
A. f(x) = 7.92/x B. f(x) = 7.92 - x C. f(x) = 7.92x D. f(x) = x/7.92
Solve the problem.Two voltages, V1 = 80 sin(110?t) and 
are added in a circuit to produce the sum 
Graph V in 
by 
and use the graph to estimate values for a and k so that 
A. a = 170; k = 1.0808 B. a = 170; k = 373.5108 C. a = 170; k = 169.317 D. a = 17; k = 1.0808