Solve the problem.How many gallons of a 30% alcohol solution must be mixed with 60 gallons of a 14% solution to obtain a solution that is 20% alcohol?
A. 36 gal
B. 27 gal
C. 12 gal
D. 7 gal
Answer: A
Mathematics
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Solve.x2 + (y + 1)2 = 36 y = x2 + 5
A. (5, 0), (-8, -i
), (-8, i
)
B. (-
, 8), (
, 8), (-i
, -5), (i
, -5)
C. (0, 5), (-i
, -8), (i
, -8)
D. (-i
, -8), (i
, -8), (-
, 5), (
, 5)
Mathematics
Solve the system by substitution. x + 7y = 27 6x + 7y = 57
A. ? B. {(7, 2)} C. {(6, 3)} D. {(-3, 6)}
Mathematics
Solve the equation numerically by completing the given table of values.4.4x - 3.8 = 5 
A. 6 B. 1 C. 2 D. 3
Mathematics
Multiply and, if possible, simplify.
? 
A. 3x
B. 18x
C. 18
D. 18x2
Mathematics