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4 years ago

What is the solution of the following system?

1 answer:

5 0

<span>4x-y = 15 3x+2y = -8 Multiplying the first equation by two makes for an easy elimination of the y variable. 8x - 2y = 30 3x + 2y = -8 Add vertically. 11x = 22. Divide by 11 on both sides and get x = 2. Plug into an equation. 4(2) - y = 15 8 - y = 15 8 = 15 + y 8 - 15 = y -7 = y. Thus the solution is indeed (2, -7).</span>

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anyanavicka [17]

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4 years ago

What is the answer to 9+3/4x=7/8x-10

kolezko [41]

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3 years ago

50 points.

Sphinxa [80]

Answer:

Step-by-step explanation:

Using the rules of exponents

$(a^m)^{n}$ = $a^{mn}$

$a^{m}$ × $a^{n}$ = $a^{(m+n)}$

Given

$(\frac{1}{x^{(a-b)}) } ^{a+b}$ × $(\frac{1}{x^{b+a}) } ^{b-a}$

= $\frac{1}{x^{(a-b)(a+b)} }$ × $\frac{1}{x^{(b+a)(b-a)} }$

= $\frac{1}{x^{(a^2-b^2)} }$ × $\frac{1}{x^{(b^2-a^2)} }$

= $\frac{1}{x^{(a^2-b^2+b^2-a^2)} }$

= $\frac{1}{x^{0} }$

= $\frac{1}{1}$

= 1

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olasank [31]

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Hey You!

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