Solve the system by the method of substitution.
?
?
?
A. (0, 0)
B. (
, )
C. (
, - )
D. (- 
, )
E. (- 
, - )
Answer: B
Mathematics
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Factor the expression completely.9x5 - 100x
A. x(3x2 + 10)(x + 1)(x - 1) B. (3x2 + 10)(3x2 - 10) C. x(3x2 + 10)(3x2 - 10) D. prime
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Use the Trapezoidal Rule with n = 4 steps to estimate the integral.
A. 
B. 
C. 
D. 
Mathematics
Graph the hyperbola. Give the coordinates of the center as well as the values of a and b.y2 - 9x2 = 81
A. center (0, 0), a = 9, b = 3
B. center (0, 0), a = 9, b = 3
C. center (0, 0), a = 3, b = 9
D. center (0, 0), a = 3, b = 9
Mathematics
Find the constant of proportionality k, and write the linear function relating the two variables.Suppose that Q varies directly with x and inversely with y. When Q = 3, x = 21 and y = 63.
A. k = 9; Q = 
B. k = 
; Q = 
C. k = 7; Q = 
D. k = 9; Q = 
Mathematics