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ohaa [14]
3 years ago
5

Solve the equation 3x+15=3(x+5)

Mathematics
2 answers:
stich3 [128]3 years ago
5 0

Answer:

Step-by-step explanation:

Step 1: equation at the end of step 1  :

(3x+15) -3(x+5)=0

step 2: equation at the end of step 2:

0=0

DaniilM [7]3 years ago
4 0

Answer:

All real numbers are solutions.

Step-by-step explanation:

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3 years ago
Kelly earns 15% more than her sister, and together they earn $999.75. How much does Kelly earn per week?
valina [46]

Answer:

534. 75

Step-by-step explanation:

let the income of kellys sister be x

kellys income=x+15% of x

=23x over 20

x+23x/20=999. 75

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3 years ago
Two ships leave the same port at the same time. Two hours later ship A has traveled 12 miles and ship B has traveled 8 miles.
MakcuM [25]

Answer:

the angle between their paths is <em>100.8°</em>

Step-by-step explanation:

From the given information, you can construct a triangle, just like the one in the figure.

We will use the <em>Cosine Rule</em> which is:

c² = b² + a² - 2 b c cos(θ)

where

  • c = 16 miles
  • b = 8 miles
  • a = 12 miles

Therefore,

2 b c cos(θ) = b² + a² - c²

cos(θ) = (b² + a² - c²) / 2 b c

θ = cos⁻¹( (b² + a² - c²) / (2 b c) )

θ = cos⁻¹( (8² + 12² - 16²) / 2(8)(16) )

<em>θ = 100.8°</em>

<em></em>

Therefore, the angle between their paths is <em>100.8°</em>

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You have cup of cornmeal in your cupboard. A recipe for muffins calls for
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You would have none left. If you started with one cup of cornmeal and then you used that one cup of cornmeal to make the muffins, you would have none left
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