Provide an appropriate response.Cast iron contains 4.25% carbon. If a bar contains 13.6 pounds of carbon, how heavy is the bar?
A. 3.2 lb
B. 0.578 lb
C. 320 lb
D. 57.8 lb
Answer: C
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Find the largest open interval where the function is changing as requested.Increasing y = 7x - 5
A. (-5, ?) B. (-?, ?) C. (-5, 7) D. (-?, 7)
Solve the problem.Find the value for x in the following special right triangle. Use exact values. 
3 m
A. 6
m
B. 
m
C. 6 m
D. 3
m
Solve the system of equations using substitution.
A. x = 5, y = 10 or (5, 10) B. x = 5, y = 10; x = 5, y = -10 or (5, 10), (5, -10) C. x = 5, y = 10; x = -5, y = 0 or (5, 10), (-5, 0) D. x = 5, y = 10; x = 5, y = -10; x = -5, y = 0 or (5, 10), (5, -10), (-5, 0)
Graph the function f by starting with the graph of y = x2 and using transformations (shifting, compressing, stretching, and/or reflection).f(x) = 5x2 + 10x - 4 
A. 
B. 
C. 
D. 