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3 years ago

Need help!!!! Asap I’ll Mark Brainly

Mathematics

1 answer:

antiseptic1488 [7]3 years ago

7 0

Answer:

I think 9 and 12 are paraellograms. the others are not paraellograms. dunno if im right. but I tried my best

Step-by-step explanation:

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Step-by-step explanation:

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3 years ago

A trapezoid has sides measuring 6cm and 10cm, what is the third side?

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3 years ago

Tell whether the angels are complementary or supplementary then find x

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x = 31

Step-by-step explanation:

Since, (3x + 25)° and 2x° are straight line angles. Therefore they are supplementary angles

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3 years ago

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3 years ago

Read 2 more answers

A factory is to be built on a lot measuring 210 ft by 280 ft. A local building code specifies that a lawn of uniform width and e

Tresset [83]

Answer:

Width of lawn = 35 ft

Dimensions of factory = length: 210 ft, width: 140 ft

Step-by-step explanation:

The total area of the lot can be calculated as:

$A_{lot} = 210 * 280\\A_{lot} = 58800 ft^{2}$

Since, the area of factory should be equal to area of lawn:

$A_{lot} = A_{factory} + A_{lawn}\\58800 = 2 A_{factory or lawn}\\\\A_{factory or lawn} = \frac{58800}{2}\\A_{factory or lawn} = 29400 ft^{2}$

Now, let 'x' be the width of lawn, the dimensions of factory can be written as:

$(210-2x)\\(280-2x)\\$

Since, area is equal to length x width:

$(210-2x)*(280-2x) = 29400\\Simplifying:\\210*280 - 210*2x - 2x*280 + 4x^{2} = 29400\\58800 - 420x - 560x +4x^{2} = 29400\\4x^{2} - 980x +58800 = 29400\\4x^{2} - 980x + 29400 = 0\\$