2 years ago

What shape has an infinite number of lines of symmetry? Octagon Octagon Rectangle Rectangle Circle Circle Square

Mathematics

1 answer:

ycow [4]2 years ago

8 0

A circle is correct explanation a circle has no end to it it is just an infinite ball

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explain how multiplying a whole number and a decimal is similar to and different from multiplying whole numbers

Mrac [35]

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2 years ago

Find in degrees the numeric value of the acute angle of rotation that eliminates the product term from the equation 7x2+24xy−34x

lutik1710 [3]

Rotating the graph of $Ax^2+Bxy+Cy^2+Dx+Ey+F=0$ with $B\ne0$ counterclockwise by $\theta$ eliminates the $xy$ term, where $\cot2\theta=\frac{A-C}{B}.$ Plugging in, we have $\cot2\theta=\frac{7}{24},$ since $C=0.$ Solving, we have $\theta=\frac{1}{2}\cot^{-1}(\frac{7}{24})\approx\boxed{36.9^\circ}.$