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2 years ago

If 20m2 square of carpet cost 36, find the cost of 35m square and 15m square

Mathematics

1 answer:

Illusion [34]2 years ago

4 0

Answer: 63 and 27.

Step-by-step explanation:

1 m² of carpet will cost:

$\displaystyle\\\frac{36}{20} =1,8.\\\\Hence,\\$

35 m² of carpet will cost:

$1,8*35=63.\\$

15 m² of carpet will cost:

$1,8*15=27.$

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First step is to: Isolate the constant term by adding 7 to both sides

Step-by-step explanation:

We want to solve this equation: $2x^2 + 12x - 7 = 0$

On observation, the trinomial is not factorizable so we use the Completing the square method.

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Step 3: Divide the coefficient of x by 2, square it and add it to both sides.

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