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3 years ago

Which equation is an identity?

Mathematics

2 answers:

OleMash [197]3 years ago

4 0

5w + 8 - w = 6w - 2(w - 4)

Hope this helps :)

sasho [114]3 years ago

3 0

Answer:

Option b - $5w + 8 - w = 6w - 2( w - 4)$

Step-by-step explanation:

To find : Which equation is an identity?

Solution :

Option a - $11- (2v + 3) = -2v - 8$

If we open the parenthesis,

$11- 2v -3 = -2v - 8$

$-2v+8\neq -2v - 8$

No identity applied.

Option b - $5w + 8 - w = 6w - 2( w - 4)$

If we apply distributive property, $a(b+c)=ab+ac$

$5w + 8 - w = 6w - 2w+8$

$4w+8= 4w+8$

Distributive identity is applied.

Option c - $7m - 2 = 8m + 4 - m$

Solve by subtracting in RHS

$7m - 2 \neq 7m + 4$

No identity applied.

Option d- $8y + 9 = 8y - 3$

This is not possible as $8y + 9 \neq 8y - 3$

No identity applied.

Therefore, Option b is correct.

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A farmer had twice as many chickens as ducks on his farm. After he sold 166 chickens and ducks, he had half as many chickens as

mamaluj [8]

Answer:

The farmer have at first 202 chickens.

Step-by-step explanation:

Given:

A farmer had twice as many chickens as ducks on his farm. After he sold 166 chickens and ducks, he had half as many chickens as ducks left.

Now, to find the chickens farmer have at first.

Let the chickens be $x.$

And, the ducks be $y.$

As, the farmer had twice as many chickens as ducks on his farm.

So, $x=2y$ ......(1)

As, given the farmer after selling 166 chickens and ducks, he had half as many chickens as ducks left.

According to question:

$x-166=(y-29)\times \frac{1}{2}$

$x-166=\frac{y-29}{2}$

Substituting the value of $x$ from equation (1) we get:

$2y-166=\frac{y-29}{2}$

By cross multiplying we get:

$4y-332=y-29$

Adding both sides 332 we get:

$4y=y+303$

Subtracting both sides by $y$ we get:

$3y=303$

Dividing both sides by 3 we get:

$y=101.$

Now, to get the number of chickens substituting the value of $y$ in equation (1):

$x=2y\\\\x=2\times 101\\\\x=202.$

Therefore, the farmer have at first 202 chickens.

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3 years ago

-12xy^3z^5+15x^2z factor

azamat

Step-by-step explanation:

Kankam faktöriyel mi bu?Zormuş yaa nasıl cozcez acaba??

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2 years ago

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Consider the statement: “In a triangle, the measure of an

Lerok [7]

Answer:

See the example given in the picture attached.

Step-by-step explanation:

No options are given, so I made my own example. In the picture attached, we can see that the measure of the exterior angle A is less than the measure of the adjacent interior angle B.

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Pergunta 5 You need to fill a football with air to play with it. You know that your pump expels air at speed of 8.2 ft/s. The ne

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The volume flow rate of the air being pumped into the football will be given by:
Q=V*A
Where
V=Speed
A=Area
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The area of The needle of your pump is
A=pi*r^2=pi*((4.5/1000)*(3.28))^2=0.00068442 ft^2
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3 years ago

Classify triangle by its Aangles and sides

goldenfox [79]

Answer:

Triangle is a three(3) sided shape i.e it has 3 sides and angles. Triangle can classify based on its side (length and equality) and size of its angles.

Step-by-step explanation:

A, Classification by sides: There are three types of triangle base on sides. These are:

1. Scalene Triangle : This describe triangle that has none of its side to be equal. i.e none of the three sides has no equal length.

2. Isosceles Triangle : This describe triangle that has two of its side equal. Also two of the angles are equal.

3. Equilateral Triangle : This describe triangle that has all its side equal i.e all three sides have equal length. Also all angles are of equal sizes.

B. Classification by size of angle: There are four types of triangle base on classification by angle:

1. Acute Triangle : This describe triangle with all three angles less than 90 degree.

2. Obtuse Triangle : This describe triangle that has one of its angle greater than 90 degree

3. Right Angled Triangle : This describe triangle with one of its angle equal 90 degree.

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