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Marina86 [1]
2 years ago
11

Anybody know the real answer to this?

Mathematics
1 answer:
maks197457 [2]2 years ago
8 0

Look at the picture.

Use the Pythagorean theorem:

x^2=(3+2)^2+(4+5)^2\\\\x^2=5^2+9^2\\\\x^2=25+81\\\\x^2=106\to x=\sqrt{106}\\\\x\approx10.3

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Answer these for me please!
goldfiish [28.3K]

6 √5

7 π

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2 years ago
Please help me. I really appreciate it if you answered. Thank you! <3
exis [7]

Answer:

$3100 is invested at 9%

$4900 is invested at 11%

Step-by-step explanation:

Let's take "x" be the amount invested at 9%.

(x + 1800) is invested in another account at 11%.

The interest amount earned by the two accounts is $818.

Here we can use the simple interest formula and find the amount invested in each account.

Simple interest (I) = , where P- is the principal , N is the number of years and R is the interest rate.

Simple interest =

0.09x + 0.11(x+1800) = 818

Now we have to simplify and find the value of x .

Use the distributive property and simplify the second term.

0.09x + 0.11x + 198 = 818

0.2x + 198 = 818  

0.2x =818 - 198

0.2x = 620

x = 620/0.2

x = 3100.

So $3100 is invested at 9%

x + 1800 = 3100 + 1800

= $4900

$4900 is invested at 11%

Hope this helped.

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