Simplify.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that y is directly proportional to x. When x = 8, then y = 2.
A. k = 4; y = 4x
B. k = 
; y = 
x
C. k = 
; y = 
x
D. k = 6; y = x + 6
Mathematics
Determine the domain and the range of the function.f(x) = -x2 + 8x - 7
A. domain: all real numbers range: {y|y ? -9} B. domain: all real numbers range: {y|y ? 9} C. domain: all real numbers range: all real numbers D. domain: {x|x ? -4} range: {y|y ? 9}
Mathematics
Solve using the elimination method.2 x - y = 7-2 x + y = -7
A. Infinite number of solutions B. No solution C. (6, 6) D. (5, 6)
Mathematics
Replace the ? with < or >.0.37700 ? 0.377
A. = B. < C. >
Mathematics