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ivann1987 [24]
3 years ago
9

Combine the like terms to make a simpler expression: -n + (-3) + 3n +5

Mathematics
1 answer:
RideAnS [48]3 years ago
3 0
Like terms are terms that have the same variable. In this equation, your like terms are terms with n and terms without n. Put the like terms next to each other in the expression.

-n + 3n + (-3) + 5

Now, combine -n and 3n the same way you would combine -1 and 3.

2n + (-3) + 5

Next, combine -3 and 5.

2n + 2

Since 2n and 2 aren't like terms, your final answer will be 2n + 2.

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FrozenT [24]

Answer:

  • D) 44°

Step-by-step explanation:

According to the diagram we observe:

  • ∠ACD is the exterior angle of triangle ABC.

As we know the exterior angle is same as the some of the remote interior angles.

It can be shown as:

  • m∠ACD = m∠CAB + m∠CBA

Substitute the values and solve for x:

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The matching <u>answer</u> choice is D.

7 0
2 years ago
Which set of numbers can represent the side lengths, in centimeters, of a right triangle?
chubhunter [2.5K]

Answer:

The set {10 , 24 , 26} formed a right triangle

Step-by-step explanation:

* Lets explain how to check the sides lengths which formed a  

 right triangle

- In triangle ABC

# If AC is the longest side in length

# If (AC)² = (AB)² + (BC)²

∴ AB , BC , AC formed a right angle triangle  

∴ m∠B = 90°  (The angle opposite to the longest side)

∴ AC is the hypotenuse

* Now lets solve the problem

- In set 8 , 12 , 15

∵ The longest side is 15 cm

∴ (15)² = 225

∵ (8)² + (12)² = 64 + 144 = 208

∵ (15)² ≠ (8)² + (12)²

∴ The set not formed a right triangle

- In set 10 , 24 , 26

∵ The longest side is 26 cm

∴ (26)² = 676

∵ (10)² + (24)² = 100 + 576 = 676

∵ (26)² = (10)² + (24)²

∴ The set formed a right triangle

- In set 12 , 20 , 25

∵ The longest side is 25 cm

∴ (25)² = 625

∵ (12)² + (20)² = 144 + 400 = 544

∵ (25)² ≠ (12)² + (20)²

∴ The set not formed a right triangle

- In set 15 , 18 , 20

∵ The longest side is 20 cm

∴ (20)² = 400

∵ (15)² + (18)² = 225 + 324 = 549

∵ (20)² ≠ (15)² + (18)²

∴ The set not formed a right triangle

* The set {10 , 24 , 26} formed a right triangle

8 0
4 years ago
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katrin [286]
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6 0
3 years ago
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uysha [10]
15 and 10 with a guess do not write this
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3 years ago
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Luda [366]

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4 0
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