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tino4ka555 [31]
3 years ago
12

Katie earned $1890 in 7 years on an investment at a 6% annual simple interest rate.

Mathematics
2 answers:
n200080 [17]3 years ago
7 0

Her investment was $4500. To get this, you take 1890 and divide it by 7, giving you 270. This is 6% of 4500. To prove this, you would multiply 4500 by .06, giving the answer of 270, which can then be multiplied by 7 (years) to equal $1890.

avanturin [10]3 years ago
7 0
793.80
1890x6%=113.4
113.4x7=793.80
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Answer:

B(the second one: x to the power of negative 2 multiplied by y, the whole over x to the power of negative 6 multiplied by y to the power of 2.)

Hope this helps

Have a nice day!

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How do you do C and B
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x = 6

Step-by-step explanation:

It's based on similarity of triangles

DEF ~ △XYZ

\implies \mathsf{ \frac{DE }{ XY } =  \frac{EF}{YZ} =  \frac{ FD}{ZX}}

The sides should be taken in order, like the triangles start with DE and XY so, we'll proportionate DE and XY and then the next two sides and so on.

I'm using \mathsf{ \frac{DE }{XY } =  \frac{EF}{YZ} }to get the value of x.

[You can use any two fractions out of the three given above. ]

\implies \mathsf{ \frac{10}{x - 1} =  \frac{8}{4}  }

\implies \mathsf{ \frac{10}{x - 1} =  2  }

\implies \mathsf{ 10 =  2 (x - 1) }

\implies \mathsf{ 10 =  2 x - 2 }

\implies \mathsf{ 10  + 2=  2 x  }

\implies \mathsf{ 1 2=  2 x  }

\implies \mathsf{ x = 6 }

Hence, the value of x is 6.

5 0
2 years ago
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