Write a general formula to describe the variation.z varies directly with the sum of the squares of x and y; z = 10 when x = 6 and y = 8
A. z = 
(x2 + y2)
B. z2 = x2 + y2
C. z = 
(x2 + y2)
D. z = 
(x2 + y2)
Answer: D
Mathematics
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Find the function f?g and its domain if 
and 
.
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Solve by substitution and check.2x + 10y = 2 x = -5y + 1
A. (1, 5) B. (5, 1) C. Infinitely many solutions D. No solution
Mathematics
Give the domain and range of the function.s(x) = 
A. Domain: (-?, 5) ? (5, ?); Range: (-?, 0) ? (0, ?)
B. Domain: (-?, 5]; Range: [0, ?)
C. Domain: (
, ?); Range: (-?, 0]
D. Domain: all real numbers; Range: [0, ?)
Mathematics
Solve the system.
A. (-5, -1), 
B. (5, 1), 
C. (5, 1), 
D. (5, -1), 
Mathematics