Find the exact value of the indicated trigonometric function of ?, if ? is an angle in standard position whose terminal side contains the given point.(6, 8); Find cos ?.
A. 
B. 
C. 
D. 
Answer: B
Mathematics
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Subtract the fractions below, and express the answer in its lowest terms.
?
?
A.
B.
C.
D.
E.
none of these
Mathematics
Determine whether or not the triangles are similar.
A. Similar B. Not similar
Mathematics
Provide an appropriate response.If the vertex of the graph of a quadratic function lies in quadrant II and the graph is concave up, how many x-intercepts does the graph have?
A. 2 B. 1 C. 0 D. 3
Mathematics
Find the vertex, focus, and directrix of the parabola. Graph the equation.(y + 2)2 = 8(x + 3)
A. vertex: (3, 2)
focus: (3, 4)
directrix: y = 0
B. vertex: (-3, -2)
focus: (-1, -2)
directrix: x = -5
C. vertex: (-3, -2)
focus: (-3, 0)
directrix: y = -4
D. vertex: (2, 3)
focus: (4, 3)
directrix: x = 0
Mathematics