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laiz [17]
3 years ago
7

If you were to solve the following system by substitution, what would be the best variable to solve for and from what equation?.

. 2x+8y=12. 3x-8y=11. . A. y, in the first equation. B. x, in the second equation. C.x, in the first equation. D. y, in the second equation
Mathematics
2 answers:
Ludmilka [50]3 years ago
5 0

Answer:

the answer is c

Step-by-step explanation:

jeka57 [31]3 years ago
4 0
The answer is C. x, in the first equation. The first equation is easiest to simplify since other than 8y is their common variable, equation 1 is also divisible by 2 so it will not contain any fractions which would be harder to simplify.

Rearranging the first equation, the result would be:

2x + 8y = 12
8y = 12-2x----equation 1

This equation can then be directly substituted to the second equation since the value of 8y is given.

Substitute the right hand of the first equation of 8y which is 12-2x to the second equation. The result would be:

3x-(12-2x) = 11
3x-12 + 2x =11
5x = 11+12
5x = 23
x= 23/5
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3 years ago
Principal $4,700 Interest rate 4% time 10 months, what is the simple interest and maturity level?
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The simple interest of $4,700 principal at 4% interest and 10 months is <u>$156.67</u> and its <u>maturity level</u> is <u>83%</u>.

<h3>What is simple interest?</h3>

Simple interest refers to the interest calculated only on the principal.

With the simple interest method, the borrower only pays interest on the principal without considering the previously-accumulated interests.

<h3>Data and Calculations:</h3>

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2 years ago
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