Solve the problem.In a chemistry class, 4 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6% solution. How many liters of the 10% solution are needed?
A. 3.0 L
B. 4.0 L
C. 2.0 L
D. 1.0 L
Answer: C
Mathematics
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A. 6s6t5(3s2 + t) B. s4t4(18s + 6t) C. 6s4t4(3s2 + t) D. 6s2t(3s + t)
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Factor.5x6 - 45x5 + 70x4
A. 5x4(x - 7)(x - 2) B. 5x4(x2 - 9x + 14) C. x4(5x - 35)(x - 2) D. x4(x - 7)(5x - 10)
Mathematics
Solve the problem.Express the gross salary G of a person who earns $40 per hour as a function of the number x of hours worked.
A. G(x) = 40x2
B. G(x) = 
C. G(x) = 40x
D. G(x) = 40 + x
Mathematics
Multiply.-9x5 ? 7x7 ? 2x5
A. 126x17 B. -126x175 C. 126x175 D. -126x17
Mathematics