Solve the system.2w + x - 2y + z = -1-w + 2x + y - 2z = -52w - x + 2y + 2z = 8 w + x - 2y - z = 1
A. (-4, -1, 2, 3)
B. (4, -4, 1, -3)
C. (-4, 3, 2, 1)
D. (4, -8, 0, 3)
Answer: B
Mathematics
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Solve the problem.The formula A = -10(log 10 Pi - log 10 Po) gives the power gain (in dB) if Pi is the input and Po is the output. Write the expression on the right side as the logarithm of a single quantity.
A. log 10 (Pi/Po)10 B. log 10 (Pi- Po)-10 C. log 10 (PiPo)-10 D. log 10 (Pi/Po)-10
Mathematics
Solve the equation.
= 
A. 
B. 
C. 
D. 
Mathematics
Solve the problem.There are 2.2 milligrams of iron in a 3.5 ounce serving of lamb. How much iron is in 4 ounces of lamb? Round to the nearest tenth, if necessary.
A. 1.9 mg B. 2.5 mg C. 2.9 mg D. 3.5 mg
Mathematics
Find the indicated intercept(s) of the graph of the function.y-intercept of f(x) = 
A. 
B. 
C. (0, 4)
D. none
Mathematics