What is the solution x+2y=7 and x-2y=-1

1 answer:

7 0

$\underline{+\left\{\begin{array}{ccc}x+2y=7\\x-2y=-1\end{array}\right}\qquad\text{add both sides of the equations}\\\\.\qquad\qquad2x=6\qquad\text{divide both sides by 2}\\.\qquad\qquad \boxed{x=3}\\\\\text{Put the value of x to the first equation}\\\\3+2y=7\qquad\text{subtract 3 from both sides}\\\\2y=4\qquad\text{divide both sides by 2}\\\\\boxed{y=2}\\\\Answer:\ \boxed{x=3\ and\ y=2\to(3,\ 2)}$

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Hope this helped!

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2 years ago

What is the simplified form?

yarga [219]

Answer:

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Step-by-step explanation:

Step 1: Simplify square roots

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So, $\frac{x^86\sqrt{2} }{x^{18}5\sqrt{2} }$

Step 2: Cancel like terms

$\frac{6}{x^{10}(5)}$

Step 3: Rewrite

And we should get our answer!

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3 years ago

The area of a square with sides of 2 feet is 4 square feet. The area of a square with sides of 4 feet is 16 square feet. What eq

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2 years ago

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Answer:

144 boys and 384 girls

Step-by-step explanation:

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