Factor the trinomial, if possible.-2x2 - 6x + 20
A. -2(x + 2)(x - 5)
B. 2(x - 2)(x + 5)
C. -2(x + 2)(x + 5)
D. -2(x - 2)(x + 5)
Answer: D
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Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 
, y = 0, x = 1, x = 8
A. ?ln 8
B. 
?
C. 
?
D. 
?
Lupe deposits a sum of $13,000 into an account that pays interest at the rate of r/year compounded monthly. Her investment at the end of 10 yr is given by 
.
?
Approximately how much more would Lupe's account be worth at the end of the term if her account paid 5.1%/year instead of 5%/year? 5.2%/year instead of 5%/year? 5.3%/year instead of 5%/year?
?
(Hint: Use the differential of A to answer this questions.)
?
A. $203.22, $446.45, $669.67 B. $212.22, $428.45, $642.67 C. $212.22, $426.45, $642.67 D. $213.22, $446.45, $639.67 E. $213.22, $426.45, $639.67
Write the augmented matrix for the system of equations. 4x + 3z = 33 9y + 5z = 42 6x - 2y + 8z = 54
A. 
B. 
C. 
D. 
x? = ?y, y? = ?4x ? 3y
Solve the first-order linear system.