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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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Devaughn is 15 years older than Sydney. the sum of their ages is 113. what is sydneys age?
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Answer:

49

Step-by-step explanation:

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sydney= x

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Evgesh-ka [11]

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Step-by-step explanation:

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2 years ago
A sled is being pulled across a floor by two ropes such that the angle between them is 40°. If the forces on the ropes are 100 p
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Answer:

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Step-by-step explanation:

Best explanation of the question is as shown in the attached figure.

we will use the parallelogram method to calculate resultant force.

to get the length of the resultant force ⇒ use the cosines law

The cosine law is a² = b² + c² - 2 * b * c * cos (∠A)

Applying at the question where b = F₁  , c = F₂  and  ∠A = ∠x

Given that F₁ = 100 pounds  , F₂ = 150 pounds  and  ∠x = 180° - 40° = 140°

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