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Brilliant_brown [7]
3 years ago
7

Solve for x: 9x - 3 - 8x = 7 - x O O A. X=-7 O B. x = -2 D c. x=4 (0) O D. X = 5. ​

Mathematics
1 answer:
Anna11 [10]3 years ago
8 0

9514 1404 393

Answer:

  D.  x = 5

Step-by-step explanation:

Add x+3 to both sides and simplify.

  9x -3 -8x +(x +3) = 7 -x +(x +3)

  2x = 10 . . . . . simplify

  x = 5 . . . . . . . divide by 2

__

As you can see, the expression we chose to add (x+3) is the one that results in variable terms being separated from constant terms after simplification.

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She has 113 grams left.

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What formed the intrusion
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Which number line represents the solution set for the inequality 3(8 – 4x) < 6(x – 5)?
nignag [31]
3(8 – 4x) < 6(x – 5)?- 12x + 24 < 6x - 30
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The sum of three consecutive multiples of three are 54 more than twice the smallest number. What are the three integers?
Misha Larkins [42]

Answer:

45, 48, and 51.

Step-by-step explanation:

The numbers are 3x, 3x+3, and 3x+6. Write the equation: 9x+9=6x+54. Solve: x=15. So the numbers are 45, 48, and 51.

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6 0
4 years ago
Find the coterminal angle between 0 and 360°of the angle -280°
Bond [772]

Answer: So, the coterminal angle of 450° is -90°.

Step-by-step explanation:(i) 395°  

Write 395° in terms of 360°.

395°  =  360° + 35°

So, the coterminal angle of 395° is 35◦

(ii) 525°

Write 525° in terms of 360°.

525°  =  360° + 165°  

So, the coterminal angle of 525° is 165°.

(iii) 1150°

Write 1150° in terms of 360°.

1150°  =  3(360°) + 70°  

So, the coterminal angle of 1150° is 70°.

(iv) -270°

Write -270° in terms of 360°.

-270°  =  -360° + 90°

So, the coterminal angle of 270° is 90°.

(v) -450°

Write -450° in terms of 360°.

-450°  =  -360° - 90°  

So, the coterminal angle of 450° is -90°.

8 0
4 years ago
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