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