Solve the system by graphing. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. {(8, -5)}
B. no solution; ?
C. infinitely many solutions; {
x = 8} or {
x = -5}
D. {(-5, 8)}
Answer: B
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Add. Do not use a number line except as a check.- 
+ 
A. - 
B. - 1
C. 1
D. 
Graph the function.f(x) = 
x
A. 
B. 
C. 
D. 
Find all cube roots of the complex number. Leave answers in trigonometric form.4 - 4i
A. 
cis 100°, 
cis 220°, 
cis 340°
B. 
cis 60°, 
cis 180°, 
cis 300°
C. 
cis 80°, 
cis 200°, 
cis 320°
D. 
cis 100°, 
cis 220°, 
cis 340°
Using the illustration, find the measure of each acute angle for the right triangle below. Answers are rounded using the appropriate rule for significant digits.a = 348.2 m, b = 495.2 m
A. A = 30.11 o, B = 59.89 o B. A = 20.71 o, B = 69.29 o C. A = 35.11 o, B = 54.89 o D. A = 31.67 o, B = 58.33 o E. A = 32.61 o, B = 57.39 o