the base of a triangle is 7 less than twice its height. If the area of the triangle is 102m^2, find the length of the base.

Answers

Answer 1

Answer:

The length of the base will be: 17 m

Step-by-step explanation:

Given the area of the triangle

[tex]A=102\:m^2[/tex]

Using the formula of Area of a triangle:

[tex]A=\frac{1}{2}\left(b\times h\right)[/tex]

Here,

'b' is the base'h' is the height

As the base of a triangle is 7 less than twice its height.

so

[tex]b=2h-7[/tex]

so the formula of Area of a triangle becomes

[tex]102=\frac{1}{2}\left(\left(2h-7\right)\times \:h\right)[/tex]

[tex]204=h\left(2h-7\right)[/tex]

[tex]2h^2-7h=204[/tex]

[tex]2h^2-7h-204=0[/tex]

[tex]\left(2h+17\right)\left(h-12\right)=0[/tex]

[tex]2h+17=0\quad \mathrm{or}\quad \:h-12=0[/tex]

[tex]h=-\frac{17}{2},\:h=12[/tex]

As height can not be negative, so:

[tex]h=12[/tex] m

Hence, the length of the base:

[tex]b=2h-7[/tex]

   [tex]= 2(12)-7[/tex]

    [tex]=24-7[/tex]

     [tex]= 17[/tex] m

Therefore, the length of the base will be: 17 m


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Step-by-step explanation:

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For |x| < 1, we have

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i.e. the golden ratio φ ≈ 1.618 and 1 - φ ≈ 0.618.

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[tex] - 5 \: \: and \: \: 3[/tex]

Look :

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Answer:

-5 and 3

Step-by-step explanation:

because -5 + 3 = -2 and -5 X 3 = -15.

-5 is bigger in -5 + 3 so your answer would be negative.

and for the multiplication on use the sleeping dog - - + you have a negative and a positive so the answer would be negative.  

1
A measuring tape measures distance to
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Answers

A

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Answers

Answer:

Total cost for two days for the n members of the club = 155 + 27 n

Step-by-step explanation:

Answer:

155

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Answers

Answer:

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Step-by-step explanation:

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Answers

Answer:

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Step-by-step explanation:

Given  a pair of alternate exterior angle of 4x + 24 and 8x, we are to find the value of x that will make m and n parallel.

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please answer this question

Answers

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Step-by-step explanation:

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Step-by-step explanation:

Yer welcome

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Answers

Answer:

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Step-by-step explanation:

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Answers

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Step-by-step explanation:

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Answers

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Answers

Answer:

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Step-by-step explanation:

Answer:

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Step-by-step explanation:

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Answers

Answer:

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Answer

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