Remove parentheses and simplify.8r + 28 - 5(9r + 2)
A. -55r
B. -37r + 18
C. -37r - 3
D. 8r + 2
Answer: B
Mathematics
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Find an equation of a parabola that satisfies the given conditions.Focus (5, -5), directrix y = -9
A. (y + 5)2 = 8(x - 5) B. (x + 5)2 = 8(y + 7) C. (x - 5)2 = 8(y + 7) D. (x - 5)2 = 8(y + 5)
Mathematics
Simplify.
A. 
B. 
C. 
D. 
Mathematics
Express in terms of i.
A. -2i
B. 2
C. -2
D. 2i
Mathematics
Solve the system of equations using substitution.
A. x = 4, y = -13; x = -6, y = -3 or (4, -13), (-6, -3) B. x = -5, y = -4; x = -15, y = 6 or (-5, -4), (-15, 6) C. x = -13, y = 4; x = -3, y = -6 or (-13, 4), (-3, -6) D. x = -4, y = -5; x = 6, y = -15 or (-4, -5), (6, -15)
Mathematics