Solve the system by substitution.
x + 
y = 4
x - 2y = 21
A. {(-6, -8)}
B. {(6, -8)}
C. {(-6, 8)}
D. {(6, 8)}
Answer: B
Mathematics
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Graph the function.y = 1 + 2 cos x
A. 
B. 
C. 
D. 
Mathematics
For the point given in rectangular coordinates, find equivalent polar coordinates 
for 
and 
(-4, -4)
A. (4
, 315°)
B. (-4, 225°)
C. (4
, 225°)
D. (-8, 315°)
Mathematics
Solve the SSA triangle. Indicate whether the given measurements result in no triangle, one triangle, or two triangles. Solve the resulting triangle. Round angle measures to the nearest degree and lengths to the nearest tenth when necessary.B = 104°, b = 3, a = 24
A. A = 51°, C = 24°, c = 29 B. No triangle exists. C. A = 53°, C = 24°, c = 31 D. A = 52°, C = 24°, c = 27
Mathematics
Use the Half-angle Formulas to find the exact value of the trigonometric function. tan 165°
A. -2 - 
B. 2 - 
C. -2 + 
D. 2 + 
Mathematics