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Ivenika [448]
2 years ago
15

Why is there a 1/2 in this formula for the area of a trapezoid?

Mathematics
1 answer:
aleksandrvk [35]2 years ago
7 0

A simple answer is that any given trapezoid with height h and length of the parallel lines a and b, is half of a parallelogram with an area of (a+b) x h. Since the trapezoid is half of this, it is h(a+b)/2

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The following information is known about a savings account.
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I think it’s 946.90.
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The speed (v) of a gear varies inversely as the number of teeth (t). If a gear that has 48 teeth makes 20 revolutions per minute
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2 years ago
There are only green pens and red pens in a box. there are 3 more red pens than green pens in the box. sheila is going to take a
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Answer: 6 or 9

Step-by-step explanation:

Given the following :

Let the number of green pens = x

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Therefore, probability of red then red =

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= (x+3)(x+2) / (2x+3)(2x+2)

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Therefore,

[(x+3)(x+2) / (2x+3)(2x+2)] + [x(x-1)/(2x+3)(2x+2)] = 17/35

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Cross multiply :

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Now we have a quadratic equation which can be factoeized used using any known factorization method.

Factorizing this, we get

(x-6) = 0 or (x-9) = 0

x = 6 or x = 9

6 0
3 years ago
the area of a rectangular room is 750 square feet. the width of the room is 5 feet less than the length of the room. which equat
zhuklara [117]
Let's assume length of the room as y
so the width of the room = y - 5

Area
y * (y - 5) = 750

3 0
3 years ago
Read 2 more answers
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