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Yuri [45]
3 years ago
12

How do I solve this???

Mathematics
2 answers:
vesna_86 [32]3 years ago
6 0
-5x - 3(-4x - 9) = 83
Add 5x to both sides
-3(-4x-9) = 83 + 5x
Divide by -3
-4x-9 = 83/3 + 5/3x
Subtract 5/3x
-4x -5/3x -9 = 83/3
Add 9
-17/3x = 110/3
Multiply by 3
-17x = 110
Divide by -17
X = 6 and 8/17
zaharov [31]3 years ago
4 0
-5x-3(-4x -9)= 83

Distribute. 

-5x+12x+27= 83 (two negatives equal a positive) 

Combine like terms.

7x+27= 83

Subtract 27 from both sides.

7x= 56

Divide 7 into both sides.

x=8

I hope this helps!
~kaikers
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Answer:

  • A) k = 18.75
  • B) R(0.8) = 161419
  • C) R(0.3) = 275

Step-by-step explanation:

<u>Given expression</u>

  • R(x) = 6*e^(kx)

A) <u>Given</u>

  • x = 0.04
  • R = 10

<u>Solving for k</u>

  • 10 = 6*e^(0.04k)
  • e^(0.04k) = 10/6
  • ln (e^0.04k) = ln (1.6666)
  • 0.04k = 0.51
  • k = 0.51/0.04
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B) <u>Given</u>

  • x = 0.8
  • R= ?

<u>The value of R(0.8) is:</u>

  • R(0.8) =
  • 6*e^(0.8*12.75) =
  • 6*e^(10.2) =
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C) <u>Given</u>

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  • R = ?

<u>The value of R(0.3) is:</u>

  • R(0.3) =
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We start at point Q.  Note how 3 and 5 add  up to 8, which allows us to write:

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The directed line segment is partitioned into segments of lengths 6 and 10, whose combined length is 16, as expected.

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