Solve the system of two equations in two variables. 8x + 8y = -32-4x - 5y = 20
A. (-1, -3)
B. (0, -3)
C. (0, -4)
D. No solution
Answer: C
Mathematics
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Calculate the flux of the field F across the closed plane curve C.F = xi + yj; the curve C is the circle (x - 8)2 + (y + 9)2 = 9
A. 18? B. 18? + 24 C. 0 D. 2?
Mathematics
Determine whether the graph is the graph of a function.
A. Not a function B. Function
Mathematics
Express the given function as a composite of functions f and g such that y = f(g(x)).y = 
A. f(x) = x, g(x) = 5x + 1
B. f(x) = 
, g(x) = 5x + 1
C. f(x) = 
, g(x) = 5x - 1
D. f(x) = -
, g(x) = 5x + 1
Mathematics
Solve the problem.An earthquake was recorded as 106.5 times more powerful than a reference level zero earthquake. What was the magnitude of this earthquake on the Richter scale? R = log
.
A. 16.5 B. 6.5 C. 3.5 D. 15
Mathematics