![HarryPotterhead7](/avatars/14539.jpg)
HarryPotterhead7
21.02.2020 •
Mathematics
One safe investment pays 10% per year and a more risky investment pays 18% per year. A woman has $145,600 to invest and would like to have an income of $20,000 per year from her investments. How much should she invest at each rate? a.) Write the necessary equations. b.) Convert the equations to coefficient and variable matrices. c.) Solve this problem using inverse matrices and find the inverse using the Gauss-Jordan Method. d.) How much should she invest at each rate.
Solved
Show answers
More tips
- O Other Everything You Need to Know About Kudyabliks...
- F Food and Cooking How to cook crayfish? Everything you need to know...
- F Food and Cooking Homemade kvass: recipe and brewing process...
- H Health and Medicine How to Choose the Right Tanning Cream?...
- S Style and Beauty Secrets of Tying a Pareo: 5 Ways...
- S Sport Running: How to Do It Right?...
- H Health and Medicine Sunstroke: Causes, Symptoms, and Precautions...
- H Health and Medicine How to Deal with Heat Stroke?...
- H Horoscopes, Magic, Divination Where Did Tarot Cards Come From?...
- A Auto and Moto How many blood alcohol level units are allowed in Russian traffic laws?...
Answers on questions: Mathematics
- M Mathematics Why is angle 1 congruent with angle C in the diagram A. They interior angles to the triangle B. They are corresponding angles C. They are exterior angels to the...
- M Mathematics If f(1) = 7 and f(n) = 5(n-1) + 2, then f(4) =...
- M Mathematics Write in p by q form 2.6363...
- M Mathematics Hellpp pleeasss !!uvuvv...
- M Mathematics Judy catches the 12 30 train from Aberystwyth. 189 She arrives in Shrewsbury on time. She attends a job interview. She gets back to Shrewsbury station 1 hour and...
- M Mathematics If a+b+c =10 and an+bc+ca =15 find the value of (a+b)^3(b+c)^3(c+a)^3 -3(a+b)(b+c)(c+a)...
- M Mathematics Problem 4) A company that manufactures video cameras produces a basic model, intermediate model, and deluxe model. Over the past year, 40% of the cameras sold have...
- M Mathematics In ABC below, what is the measure of angle B? In particular, which option below gives an exact expression for mB and an approximation that is correct to the nearest...
- M Mathematics Which ordered pair is generated from the equation shown below? y = 2x + 4 A. (1, 6) B. (1, 2) C. (3, 6) D. (8, 16)...
- M Mathematics The temperature at noon was 10 degrees. For the next 3 hours it dropped at a rate of 3 degrees an hour. Express this change in temperature as an integer....
Ответ:
(a) x+y=145600, 0.1x+0.18y=20000; (b)
; (c) x=$77600, y=$68000
Step-by-step explanation:
Ответ:
since you can't really multiply with a percentage, you need to change it to a decimal, or at least a fraction
25% = 0.25 or 1/4
a. (0.25)n
is the only one that's correct in this case