2 years ago

Which two lines are parallel?

Mathematics

1 answer:

posledela2 years ago

4 0

The answer is A. 1 and 2

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X^2+y^2+14x+10y=7 <br> center and radius

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$x^2+y^2+14x+10y=7\\\\x^2+14x+y^2+10y=7\\\\x^2+2x\cdot7+y^2+2y\cdot5=7\\\\\underbrace{x^2+2x\cdot7+7^2}_{Use\ (*)}-7^2+\underbrace{y^2+2y\cdot5+5^2}_{Use\ (*)}-5^2=7\\\\(x+7)^2-49+(y+5)^2-25=7\\\\(x+7)^2+(y+5)^2-74=7\ \ \ \ |add\ 74\ to\both\ sides\\\\(x+7)^2+(y+5)^2=81\\\\(x+7)^2+(y+5)^2=9^2$

$Answer:\\\boxed{(-7;-5)-center;\ 9-radius}$

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3 years ago

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Shiraz want to create an equally tricky arithmetic sequence she wants the 5th term of the sequence to equal 11 and 50th Cham to

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Determine whether the data described are qualitative or quantitative:The weights of subjects in a clinical trial of a new drug.

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It is quantitative because they are looking at the weights which are numbers.