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3 years ago

A trapezium of area 105 cm2 has parallel sides of length 5cm and 9 cm how far apart are the parallel sides

Mathematics

1 answer:

Tanzania [10]3 years ago

6 0

For a trapezoid:
the area equals the product of half the sum of the two bases' length and the normal height between them

so that, we can write:
$105= \frac{5+9}{2}*h\\~\\h=15~~cm$

Hence <span>the parallel sides are 15 cm apart.

</span>

I hope that helps!

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Applying the concept:

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3 years ago

Read 2 more answers

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2 years ago

taurus [48]

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Step-by-step explanation:

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The most important relation that involves complex numbers is given by:

$i^2 = -1$

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Given a second order polynomial expressed by the following equation:

$ax^{2} + bx + c, a\neq0$ .

This polynomial has roots $x_{1}, x_{2}$ such that $ax^{2} + bx + c = a(x - x_{1})*(x - x_{2})$ , given by the following formulas:

$x_{1} = \frac{-b + \sqrt{\bigtriangleup}}{2*a}$

$x_{2} = \frac{-b - \sqrt{\bigtriangleup}}{2*a}$

$\bigtriangleup = b^{2} - 4ac$

In this question:

The solutions are:

$x_1 = 1 - 3i, x_2 = 1 + 3i$

We have to find the polynomial. All option have $a = 1$ . So

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The correct answer is given by option b.

6 0

2 years ago