Find the exact value of the expression.cos
sin
- cos
sin 
A.
B.
C. 1
D.
Answer: D
Mathematics
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Provide an appropriate response.Solve the following system of equations using the addition method: 2x - y = 7 3x - y = 9
Fill in the blank(s) with the appropriate word(s).
Mathematics
Use the square root property to find all real or imaginary solutions to the equation.(x + 9)2 = - 7
A. {-2, 16}
B.
C.
D.
Mathematics
Solve.Two angles are said to be supplementary if their sum is 180°. If one angle measures degrees, find the measure of its supplement.
A.
B.
C.
D.
Mathematics
Factor completely.x2 + 2xy - 80y2
A. (x + 10y)(x - 8y) B. (x - 10y)(x + 8y) C. Prime D. (x - 10y)(x + y)
Mathematics