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3 years ago

What is the value of the expression when a = 5, b = 4 , and c = 6?⁢ 4a2b−c .

Mathematics

2 answers:

Ilia_Sergeevich [38]3 years ago

6 0

That problem is not complete.

vfiekz [6]3 years ago

3 0

Answer:

The value of expression is 18.

Step-by-step explanation:

The following information is missing in the question. The correct expression is $4a+b - c$

We are given the following expression:

$4a+b - c$

We have to find the value of this expression when a = 5, b = 4 and c = 6.

Putting these values we get,

$4a+b - c\\=4(5)+4-6\\=20 + 4-6\\=18$

The value of expression is 18.

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In a right triangle ABC, CD is an altitude, such that AD=BC. Find AC, if AB=3 cm, and CD= 2 cm.

konstantin123 [22]

Consider right triangle ΔABC with legs AC and BC and hypotenuse AB. Draw the altitude CD.

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$AC^2=\dfrac{-3+3\sqrt{5} }{2}\cdot 3=\dfrac{-9+9\sqrt{5} }{2},\\ \\AC=\sqrt{\dfrac{-9+9\sqrt{5} }{2}}\ cm.$

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