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Write the standard form of the equation of the circle with radius r and center (h, k) .
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Q166: <span class="ql-formula" data-value="\left[ \begin{array} { r r
Q199: <span class="ql-formula" data-value="f(x)=3"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>f</mi><mo stretchy="false">(</mo><mi>x</mi><mo
Q213: Perpendicular to the line x = 8;
Q216: <img src="https://d2lvgg3v3hfg70.cloudfront.net/TB4654/.jpg" alt=" A)
Q227: Anne and Nancy use a metal
Q253: <span class="ql-formula" data-value="x-y<-2"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>x</mi><mo>−</mo><mi>y</mi><mo><</mo><mo>−</mo><mn>2</mn></mrow><annotation encoding="application/x-tex">x-y<-2</annotation></semantics></math></span><span
Q256: <span class="ql-formula" data-value="( 1 , \infty )"><span
Q258: <span class="ql-formula" data-value="x^{2}=8-x^{2}"><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><msup><mi>x</mi><mn>2</mn></msup><mo>=</mo><mn>8</mn><mo>−</mo><msup><mi>x</mi><mn>2</mn></msup></mrow><annotation encoding="application/x-tex">x^{2}=8-x^{2}</annotation></semantics></math></span><span
Q320: <span class="ql-formula" data-value="\begin{array} { r } 5
Q337: <span class="ql-formula" data-value="\begin{array} { r } 3