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Elodia [21]
4 years ago
7

Which property can you use to solve the following expression.

Mathematics
1 answer:
meriva4 years ago
7 0

Answer: Associative property

Step-by-step explanation: I choose the Associative Property because what is 6+9? It's 15, right? So, 15 +, -, ×, ÷, or √ • and what ever operation (math) to deal with the random 5.

Please mark BRAINLIEST.

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Which is the correct label for the angle?<br> A<br> С<br> B<br> O ZA<br> ZBCA<br> OZb<br> O ZCBA
elixir [45]

Step-by-step explanation:

option d is correct

Angel CBA

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5 0
3 years ago
How to solve this pythagoras theorem
My name is Ann [436]

Answer:

see explanation

Step-by-step explanation:

The hypotenuse is the longest side thus is (4x + 1)

The legs are 2x and (4x - 1)

Using Pythagoras' theorem, then

(4x + 1)² = (2x)² + (4x - 1)² ← expanding factors

16x² + 8x + 1 = 4x²  + 16x² - 8x + 1 , that is

16x² + 8x + 1 = 20x² - 8x + 1 ( subtract 20x² - 8x + 1 from both sides )

- 4x² + 16x = 0 ( multiply through by - 1 )

4x² - 16x = 0 ← factor out 4x from each term

4x(x - 4) = 0

Equate each factor to zero and solve for x

4x = 0 ⇒ x = 0

x - 4 = 0 ⇒ x = 4

Now x > 0, thus x = 4

2x = 2(4) = 8

4x - 1 = 4(4) - 1 = 16 - 1 = 15

4x + 1 = 4(4) + 1 = 16 + 1 = 17

Thus

perimeter = 8 + 15 + 17 = 40 cm

3 0
3 years ago
Carolyn flips a coin 20 times and writes down the results of each flip. Is this event independent or dependent? Explain.
Alex

Answer:

Dep

Step-by-step explanation:

I guess Dep., Because Depending on which side it lands Is the outcome.

8 0
3 years ago
2x² + 4x + 4 + x² + 1 = 180
Tasya [4]

Step-by-step explanation:

2 {x}^{2}  + 4x + 4 +  {x}^{2}  + 1 = 180

3 {x}^{2}  + 4x + 5 = 180

{3x}^{2}  + 25x - 21x - 175 = 0

x \times (3x + 25) - 7(3x + 25) = 0

(3x + 25) \times (x - 7) = 0

3x + 25 = 0 = x - 7 = 0

x =  -  \frac{25}{3}  = x = 7

= x_{1} =  -  \frac{25}{3} . \:  \:  x_{2} = 7

5 0
3 years ago
plz help In Alexis’ English class, 21 students completed an essay by the due date. There are 30 students in Alexis’ English clas
yarga [219]

Answer:

70%

Step-by-step explanation:

I'm sorry but I don't really know how to explain it other than 70% of 30 is 21 so that means that 30% of the students turned their essay in on time.

(sorry for not being able to explain it but I hope it helped)

8 0
3 years ago
Read 2 more answers
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