The augmented matrixrepresents the system of equations:

A.
B.
C.
D.


Answer: B

Mathematics

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Use identities to find the indicated value for each angle measure.sin ? = , cos ? > 0Find cos(2?).

A.
B.
C.
D. - 

Mathematics

Provide an appropriate response.Explain why the function f(x) = (x - 1)2 + 7 is not a one-to-one function.

What will be an ideal response?

Mathematics

The consumer price index (CPI) is calculated by averaging the prices of various items after assigning a weight to each item. The following table gives the consumer price indexes for selected years from 1940 through 2002, reflecting buying patterns of all urban consumers, with x representing years past 1900. Find an equation that models these data. If it's necessary, round your calculations to four decimal places. ? Year Consumer Price Index Year Consumer Price Index 1940 1950 1960 1970 14 24.1 29.6 38.8 1980 1990 2000 2002 82.4 130.7 172.2 179.9 ? Source: U.S. Bureau of the Census ?

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B.
C.
D.
E.

Mathematics

When two resistors of resistances  and are connected in parallel (see figure), the total resistance 

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Find  for a parallel circuit in which  ohms and R must be at least 1 ohm.
?

A.
B.
C.
D.
E.

Mathematics