A garden store sells Kentucky bluegrass seed for $6 per pound and ryegrass seed for $3 per pound. How much rye must be mixed with 180 pounds of bluegrass to obtain a blend that will sell for $5 per pound?
A. 90 lb
B. 60 lb
C. 80 lb
D. 105 lb
E. 70 lb
Answer: A
Mathematics
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Find the most general antiderivative.
dx
A. -4 tan x + C
B. 4 cot x + C
C. 
+ C
D. -4 cot x + C
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Write the rational expression in lowest terms.
A. c + n B. -1 C. c - n D. Already in lowest terms
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Find the slope and the y-intercept of the given line.y = - 
x + 5
A. - 
; (0, -5)
B. - 
; (0, 5)
C. 
; (0, 5)
D. 
; (0, -5)
Mathematics
Use Descartes' Rule of Signs and the Rational Zeros Theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x) = 4x3 + 19x2 - 8x + 15
A. -1, 
, 5; f(x) = (4x - 3)(x - 5)(x + 1)
B. -1, 
, -5; f(x) = (4x - 3)(x - 5)(x + 1)
C. 1, 
, -5; f(x) = (4x - 3)(x - 1)(x + 5)
D. -5, 
, 1; f(x) = (4x - 3)(x - 1)(x + 5)
Mathematics