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Damm [24]
4 years ago
7

Which is equivalent to the following expression? (2x^2+4xy-y^2)+(x^2+3xy-y^2)

Mathematics
2 answers:
ss7ja [257]4 years ago
7 0

Answer:

I agree with Lisboa The answer is C

Step-by-step explanation:


Karo-lina-s [1.5K]4 years ago
3 0

Answer C : 3x^2+7xy-2y^2

equivalent to the following expression

(2x^2+4xy-y^2)+(x^2+3xy-y^2)

2x^2+4xy-y^2+x^2+3xy-y^2

Combine like terms

2x^2+x^2+4xy+3xy-y^2-y^2

2x^2 + x^2 is 3x^2

4xy+3xy is 7xy

-y^2-y^2 is -2y^2

So expression becomes

3x^2+7xy-2y^2

Answer  C is correct

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Find m∠DEA if m∠DEA= x + 30, m∠AEF= x + 132, and m∠DEF= 146 degrees
nevsk [136]

The numerical sum of the degree measures of m ∠DEA and m ∠AEF and  m ∠DEF is 360°; The numerical measures of the angles is,

m ∠DEA = 56°

m ∠AEF = 158°

m ∠DEF = 146°

Based on the given data,

m ∠DEA= x + 30,

m ∠AEF= x + 132, and

m ∠DEF= 146 degrees

If the sum of two linear angles is 360° then, they are known as supplementary angles.

∠A + ∠B + ∠C = 360°, (∠A and ∠B and ∠C are linear angles.)

So,

We can write,

m ∠AEF + m ∠DEA + m ∠DEF = 360°

( x + 132) + (x + 30) + 146  = 360°

x + 30 + x + 132 + 146  = 360°

2x + 308 = 360°

2x = 360° - 308

x = 52/2

x =26

Now, we will substitute the value of x = 26° in the ∠DEA and ∠AEF, hence we get:

m ∠DEA = x + 30

m ∠DEA = 26 + 30

m ∠DEA = 56 degrees

Also,

m ∠AEF = x + 132

m ∠AEF = 26 + 132

m ∠AEF = 158

Hence,

m ∠DEA + m ∠AEF + m ∠DEF = 360°

56 + 158 + 146 = 360°

360° = 360°

Therefore,

Therefore, the numerical sum of the degree measures of m ∠DEA and m ∠AEF and  m ∠DEF is 360°; The numerical measures of the angles is,

m ∠DEA = 56°

m ∠AEF = 158°

m ∠DEF = 146°

To learn more about information visit Supplementary angles :

brainly.com/question/17550923

#SPJ1

6 0
1 year ago
A forest ranger wants to install a 1,500 CFM (cubic feet per minute) fan. A ranger station consists of a rectangular prism and a
levacccp [35]
Sample response: <span>Yes, the fan will provide enough airflow. The volume of the ranger station is 720 cubic feet. The ranger station requires a 720 CFM fan. 1,500 CFM is greater than 720 CFM, so it will be enough airflow.</span>
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4 years ago
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bulgar [2K]

Answer:

42

Step-by-step explanation:

G-14

O-14

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2 years ago
What is the area for this triangle
Llana [10]

Answer:

56

Step-by-step explanation:

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Help find the value of x pls. No links! Y
Citrus2011 [14]

=>7x+9=9x+5

=>7x+9-9=9x+5-9

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