Solve by completing the square.a2 + 6a + 5 = 0
A. a = 1, 5
B. a = -1, -5
C. a = ±
D. a = 10, -5
Answer: B
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Use the quadratic formula to solve the equation.x2 + x + 4 = 0
A. 
B. 
C. 
D. 
Provide an appropriate response.Tell whether the statement is true or false. If it is false, give the correct answer. Explain your answer. The easiest way to simplify the expression 
is to multiply both the numerator and denominator by 1 - 
What will be an ideal response?
For the given functions f and g, find the requested function and state its domain.f(x) = 
; g(x) = 
Find f ? g.
A. (f ? g)(x) = 
; {x|x ? 0}
B. (f ? g)(x) = 
; {x|x ? -13, x ? 0}
C. (f ? g)(x) = 
; {x|x ? -13, x ? 0}
D. (f ? g)(x) = 
; {x|x ? -13, x ? 0}
Solve.If a flagpole 15 feet tall casts a shadow that is 20 feet long, find the length of the shadow cast by an antenna which is 21 feet tall. Round to the nearest tenth of a foot, if necessary.
A. 15.8 ft B. 28 ft C. 14.3 ft D. 26 ft