Allison G.

asked • 12/05/13

system of linear equations: Matrices

Carletta has $10,000 to invest. as her financial consultant you recommend that she invest in treasury bills that yield 6%, treasury bonds that yield 7%, and corporate bonds that yield 8%. Carletta wants to have an annual income of $680, and the amount invested in corporate bonds must be half that invested in treasury bills. Find the amount in each investment. 

Jonathan W.

As a matrix equation this becomes
 
[ 1    1    1   ]   [x]       [ 10000 ]
[ .06 .07 .08 ]  [y]   =  [   680   ]
[ .5   0    -1  ]  [z]        [     0    ]
 
(
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10/06/14

4 Answers By Expert Tutors

By:

Jonathan W. answered • 12/05/13

Tutor
4.9 (276)

Patient and Knowledgeable Berkeley Grad for Math and Science Tutoring

Steve S. answered • 12/05/13

Tutor
5 (3)

Tutoring in Precalculus, Trig, and Differential Calculus

Yohan C.

Hey Steve, good work but that's all "substitution" method, not matrices.
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10/05/14

Parviz F. answered • 12/05/13

Tutor
4.8 (4)

Mathematics professor at Community Colleges

Yohan C.

Hey Parviz, where are the matrices?
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10/05/14

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