3 years ago

Can someone please help with this? the question is in the picture.

Mathematics

2 answers:

polet [3.4K]3 years ago

7 0

Pie is an irrational number for it is 3.14....

Lelechka [254]3 years ago

6 0

In the picture, the first one. Pi is an irrational answer

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Two investments totaling $21,000 produce an annual income of $870. One investment yields 4% per year, while the other yields 10%

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Answer:

The amount invested at 4% is $20,500 and the amount invested at 10% is $500

Step-by-step explanation:

Let

x -----> the amount invested at 4%

(21,000 -x) ----> the amount invested at 10%

we know that

The interest of the amount invested at 4% plus the interest of the amount invested at 10% must be equal to $870

$4\%=4/100=0.04$

$10\%=10/100=0.10$

$0.04(x)+0.10(21,000-x)=870$

Solve for x

$0.04x+2,100-0.10x=870$

$0.10x-0.04x=2,100-870$

$0.06x=1,230$

$x=\$20,500$

$21,000-x=\$500$

therefore

The amount invested at 4% is $20,500 and the amount invested at 10% is $500

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