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4 years ago

0.7x-y=4.22 5-0.8x= 0.2y

Mathematics

1 answer:

Shtirlitz [24]4 years ago

6 0

The solution of the set of equation is

x=6.217

y=0.132

<u>Step-by-step explanation:</u>

given the set of equations

0.7x-y=4.22(1)

5-0.8x=0.2y

-0.8x-0.2y=-5 (2)

multiply (1) and(2) by 10

7x-10y=42.2(3)

-8x-2y=-50(4)

solve (3) and (4) using elimination method

$(4)\times 5$

⇒-40x-10y=-250(5)

(5)-(3)

-47x=-292.2

x=6.217

substituting value of x in 3

we get y=0.132

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3 years ago

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Answer:

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Step-by-step explanation:

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3 years ago

Susan took out a personal loan for $3,500 at an interest rate of 13% compounded monthly. she made arrangements to pay the loan o

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Susan's monthly payment will be $117.93.

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P=3500

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$A = \frac{P(\frac{r}{12} )}{(1 -(1 +r/12)^{(-12t)}}$

Where A is the payment,

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r =the annual interest rate

t is the number of years.

use the given value in the formula we get

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Susan's monthly payment will be $117.93.

To learn more about the monthly payment visit:

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