Use the Gauss-Jordan method to find A-1, if it exists.A = 

A.

B.

C.

D.


Answer: D

Mathematics

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Use the two steps for solving a linear programming problem to solve the problem.Zach is planning to invest up to $45,000 in corporate and municipal bonds. The least he will invest in corporate bonds is $7000 and he does not want to invest more than $25,000 in corporate bonds. He also does not want to invest more than $32,387 in municipal bonds. The interest is 8.2% on corporate bonds and 6.2% on municipal bonds. This is simple interest for one year. What is the maximum income?

A. $23,290 B. $28,290 C. $5810 D. $48,290

Mathematics

Fill in the blank with one of the words or phrases listed below. Not all choices will be used.In the expression  the number 3 is the , the number 45 is the , and  is called the 

style="vertical-align: -10.0px;" /> sign. A. index, radicand, radical B. radicand, index, radical C. radicand, radical, index D. index, radical, radicand

Mathematics

Use a graphing calculator to estimate the solution of the equation to two decimal places.2.5(1.9x + 7.9) - 9.27(1.7x - 3.27) = 0

A. {2.44} B. {0.42} C. {2.36} D. {4.55}

Mathematics

Find an equation of variation in which y varies inversely as x and the following is true.y = 7, when x = 15

A. y = 
B. y = 
C. y = 
D. y = 105x

Mathematics