Solve by the addition method.x2 + y2 = 645x2 + 2y2 = 144
A. 
, 
B. 
, 
, 
, 
C. 
, 
, 
, 
D. 
, 
Answer: C
Mathematics
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Represent the linear system as an augmented matrix. 5x + 3y = 36 5y = 35
A. 
B. 
C. 
D. 
Mathematics
Find the period, amplitude, or shift.Find the amplitude of y = 5 cos (2x + 
).
A. 2
B. 
C. 10
D. 5
Mathematics
Find an equation of a parabola satisfying the given conditions.Focus (-5, 0), directrix y = 10
A. (x + 5)2 = -20(y - 5) B. (y + 5)2 = -20(x - 5) C. (y + 5)2 = -20(x + 5) D. (x + 5)2 = -20(y + 5)
Mathematics
Use a reference angle to find the exact value of the expression.sin -1050°
A. 
B. 
C. 
D. 
Mathematics