3 years ago

Original price of a sofa: $620.00 Discount: 25%, Selling Price?

Mathematics

1 answer:

Aleks [24]3 years ago

3 0

Answer:

x=155

Step-by-step explanation:

I hope the pictures are clear and you get the concept!

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Step-by-step explanation:

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$(AB)^T = B^T.A^T\\\\Start, from \ Right \ hand \ side\\\\B^T.A^T = \frac{B^T.A^T}{A^T}.\frac{B^T.A^T}{B^T} (multiply \ through) \\\\ = \frac{A^{2T}.B^{2T}}{A^T.B^T} \\\\=\frac{(AB)^{2T}}{(AB)^T} \ \ (factor \ out \ the power)\\\\= (AB)^{2T-T} \ (apply \ division \ law \ of \ indices; \ \frac{x^a}{x^b} = x^{a-b})\\\\= (AB)^T \ (Proved)$

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