Solve the problem.How much pure acid should be mixed with 3 gallons of a 50% acid solution in order to get an 80% acid solution?
A. 4.5 gal
B. 7.5 gal
C. 12 gal
D. 1.5 gal
Answer: A
Mathematics
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Combine the complex numbers.3i + (-5 - i)
A. -5 + 4i B. -5 + 2i C. 5 - 2i D. 5 - 4i
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Find the LCM.5, 10, and 8
A. 40 B. 400 C. 80 D. 10
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Find the maximum and minimum values of the objective function f subject to the stated constraints.f = 2x + 5y, subject to3x + 2y ? 6,-2x + 4y ? 8,x ? 0,y ? 0.
A. Maximum: 10; Minimum: 0
B. Maximum: 13
; Minimum: 0
C. Maximum: 12
; Minimum: 4
D. Maximum: 12
; Minimum: 0
Mathematics
Evaluate the variable expression.5x, when x = 3
A. 35 B. 15 C. 53 D. 8
Mathematics