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4 years ago

How to estimate 3x179

Mathematics

2 answers:

Ksju [112]4 years ago

7 0

Answer:

the actual answer is 537.

the way you could estimate is by saying :oh yeah, 179 is a specific number"

you can then change 179 to 200 (because it is closer than 150) and multiply that by 3. 3x200 could be an estimate, giving you 600.

hope this helps :)

natka813 [3]4 years ago

4 0

Answer: 3 x 179 = 537

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Answer:

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Step-by-step explanation:

We have the quadratic equation $d^{2}=36d+324$ i.e. $d^{2}-36d-324=0$

As, the roots of the quadratic equation $ax^{2}+bx+c=0$ are given by $x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}$ .

So, from the given equation, we have,

a = 1, b = -36 , c = -324.

Substituting the values in $x=\frac{-b\pm \sqrt{b^{2}-4ac}}{2a}$ , we get,

$x=\frac{36\pm \sqrt{(-36)^{2}-4\times 1\times (-324)}}{2\times 1}$

i.e. $x=\frac{36\pm \sqrt{1296+1296}}{2}$

i.e. $x=\frac{36\pm \sqrt{2592}}{2}$

i.e. $x=\frac{36\pm 50.9}{2}$

i.e. $x=\frac{36+50.9}{2}$ and $x=\frac{36-50.9}{2}$

i.e. $x=\frac{86.9}{2}$ and $x=\frac{-14.9}{2}$

i.e. x = 43.45 and x = -7.45

Thus, the roots of the equation are 43.45 and -7.45.

Hence, the factored form of the given expression will be $(x-43.45)(x+7.45)=0$

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3 years ago

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ahrayia [7]

Answer:

To cancel a term, it is necessary to add the <em>opposite of the term</em> to both sides of the equation

Step-by-step explanation:

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3 years ago

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ankoles [38]

Answer:

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Step-by-step explanation:

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