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4 years ago

15

Three swimmers competed in a 50 m freestyle race. A description of their swimming speeds is given. Order the

1 answer:

shtirl [24]4 years ago

4 0

What are the descriptions???

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How do I factorise 2t^2 + 5t +2

alekssr [168]

$2t^2+5t+2\\\\a=2;\ b=5;\ c=2\\\\\Delta=b^2-4ac;\ if\ \Delta > 0\ then\ t_1=\frac{-b-\sqrt\Delta}{2a}\ and\ t_2=\frac{-b+\sqrt\Delta}{2a}\\\\\Delta=5^2-4\cdot2\cdot2=25-16=9;\ \sqrt\Delta=\sqrt9=3\\\\t_1=\frac{-5-3}{2\cdot2}=\frac{-8}{4}=-2;\ t_2=\frac{-5+3}{2\cdot2}=\frac{-2}{4}=-\frac{1}{2}\\\\2t^2+5t+2=2(x+2)(x+\frac{1}{2})$

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3 years ago

Find the measure of the arc TDB in the circle P shown below:

andrey2020 [161]

$\huge{ \mathfrak{ \underline{ Answer \: \: ✓ }}}$

The Angle formed by an arc on the centre of the circle is double the angle made by the same arc on the circumference of the circle.

So,

$\boxed{ \mathrm{ \angle TDB = \dfrac{1}{2} \angle TPB }}$

$\mathrm{\angle TDB = \dfrac{1}{2} \times 90 \degree}$

$\mathrm{\angle TDB =45 \degree }$

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$\mathrm{☠ \: TeeNForeveR \: ☠}$

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3 years ago

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I think the answer is (3,3)

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Nimfa-mama [501]

Answer:

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Step-by-step explanation:

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