Solve the equation by first clearing the decimals.0.86x + 0.9(18 - x) = 15.84
A. {9}
B. {-9}
C. {0.09}
D. {-0.09}
Answer: A
Mathematics
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Solve the problem by integration.The current i (in A) as a function of the time t (in s) in a certain electric circuit is given by 
Find the total charge that passes a given point in the circuit during the first three seconds.
A. 1.881 C B. 7.522 C C. 3.738 C D. 3.761 C
Mathematics
Solve the problem.The pH of a chemical solution is given by the formula pH = -log10[H+] where [H+] is the concentration of hydrogen ions in moles per liter. Find the pH if the [H+] = 9.4 × 10-9.
A. 8.97 B. 9.03 C. 8.03 D. 9.97
Mathematics
Convert.0.265 hectoliters to liters
A. 265 L B. 26.5 L C. 2.65 L D. 0.0265 L
Mathematics
Find the coordinates of the vertex of the quadratic function.f(x) = (x + 2)2 + 4
A. (4, -4) B. (-2, 4) C. (4, -2) D. (-4, 2)
Mathematics