Write a system of equations for the problem, and then solve the system.Two different gasohol mixtures are available. One contains 5% alcohol and the other 12% alcohol. How much of each should be mixed to obtain 1250 gallons of gasohol containing 10% alcohol?Gallons of GasoholPercent (as decimal)Gallons of Pure Gasoholx0.05?y0.12?1250?0.10?
A. 521 gal 5%, 729 gal 12%
B. 357 gal 5%, 893 gal 12%
C. 63 gal 5%, 150 gal 12%
D. 893 gal 5%, 893 gal 12%
Answer: B
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A. 9x3y - 12x2y2 + 16xy3 B. 27x3 - 108x2y + 144xy2 - 64y3 C. 27x3 - 36x2y + 48xy2 - 64y3 D. 9x3y - 24x2y2 + 16xy3
Find the area of the region specified in polar coordinates.the region inside both 
and 
A. 
(? - 1)
B. 
(? - 1)
C. 
(? - 2)
D. 
(? - 2)
Solve the system of equations.2x + 3y 
= -53x - 4y 
= 225x + y + 3z = -2
A. {(3, -2, -5)} B. {(-5, -2, 3)} C. {(-2, 3, -5)} D. {(3, -5, -2)}
Solve the problem.A die is weighted so that an even-numbered face is three times as likely to occur as an odd-numbered face. What probability should be assigned to each face?
What will be an ideal response?