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Alekssandra [29.7K]
2 years ago
5

Explain why a triangle can't have two right angles​

Mathematics
1 answer:
Sedbober [7]2 years ago
8 0

Answer: They would be a rectangle.

Step-by-step explanation:

2 right angles need at least 4 sides, making it impossible to have a 3-sided 2 right angle triangle.

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Please help asap<br><br> solve x^4+5x^2+4=0
const2013 [10]

Answer:

x=\pm i\text{ or }x=\pm2i

Step-by-step explanation:

So we have the equation:

x^4+5x^2+4=0

Let's let u be equal to x². So:

u^2+5u+4=0

Factor:

(u+1)(u+4)=0

Zero Product Property:

u+1=0\text{ or } u+4=0

Subtract:

u=-1\text{ or }u=-4

Replace:

x^2=-1\text{ or }x^2=-4

Take square root:

x=\pm\sqrt{-1}\text{ or }x=\pm\sqrt{-4

Simplify:

x=\pm i\text{ or }x=\pm2i

7 0
2 years ago
Solve the system of linear equations. <br> −8x+5y=26<br> 9x−3y=−3
Sloan [31]

Answer: x = 3 and y = 10

Step-by-step explanation:

-8x + 5y = 26     .................. equation 1

9x - 3y = -3          ................ equation 2

Solving the system of linear equations by elimination method.

The means we have to make the coefficient of one of the variable the same in order to eliminate the variable first.

Let us eliminate the variable y first , this means we will multiply equation 1 by 3 and multiply equation 2 by 5. Doing this , we have

-24x + 15y = 78      ............. equation 3

45x - 15y = -15     ................ equation 4

Now that we have the same coefficient , we have to check their signs , if the have the same signs , we will subtract , that is , if both are having positive signs , we will subtract , if both have negative signs , we will also subtract but if their signs differ we will add. Following this rule and considering the equations above , the coefficients of y have different signs , so we will add equation 3 and equation 4 , so we have:

21x = 63

x = 63/21

x = 3

Substitute x = 3 into equation 1 or equation 2 to get the value of y , using equation 2 , we have

9x - 3y = -3

9(3) - 3y = -3

27 - 3y = -3

27+3 = 3y

30 = 3y

30/3 = y

Therefore y = 10

Therefore : x = 3 and y = 10

8 0
3 years ago
How do you verify the identity?
rodikova [14]
Their both the answer hope this helps

5 0
3 years ago
7^14 ÷ 7^2<br> I-ready btw
Lyrx [107]

Answer:

7^12

Step-by-step explanation:

7^14

-----------

7^2

When we divide with the same base, we subtract the exponents

7^(14-2)

7^12

5 0
3 years ago
Read 2 more answers
What is 2 to the power of 2?
Tju [1.3M]
Well 2 to the second power would be 2 * 2 which equals 4
8 0
3 years ago
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