Solve the problem.If sin ? = 0.8, find the value of sin ? + sin (? + 2?) + sin (? + 4?).
A. 2.4 + 6?
B. 4.4
C. 2.4
D. 0.8
Answer: C
Mathematics
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Find the focus and directrix of the parabola.x2 + 12y = 0
A. F: (-3, 0); D: y = 3 B. F: (0, -3); D: y = 3 C. F: (0, -3); D: y = -3 D. F: (0, -3); D: x = 3
Mathematics
Collect like terms and write in descending order.7x7 + 3x7 - 8x7
A. Can't be simplified B. 2x21 C. -168x7 D. 2x7
Mathematics
Write an equation in slope-intercept form of a line satisfying the set of conditions.Slope - 
; b = 3
A. y = 
x + 3
B. y = - 
x + 3
C. y = 
x - 3
D. y = - 
x - 3
Mathematics
Let 
, 
.
?
Perform the operation: 
.
?
A. 0?
B. 
?
C. 
?
D. 
?
E. not possible?
Mathematics