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Tomtit [17]
3 years ago
6

4x−2y=8 2x+y=2 ​ how many solution does this equation have ?

SAT
2 answers:
suter [353]3 years ago
7 0

Answer:y

y=2x−4

Explanation:Solve for the first variable in one of the equations, then substitute the result into the other equation.

ad-work [718]3 years ago
3 0

Answer:

Exactly one

Explanation:

I tried it on khan

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If a person takes 30 ml of vinegar a day and the molarity of the vinegar is 0. 84 m then how many grams of acetic acid (hc2h3o2
babunello [35]

The mass of the acetic acid is 1.512 g.

<h3 /><h3>What is Molarity?</h3>

molarity is the concentration of a substance in mol per dm³

From the question,

The number of moles contained in the 30 mL vinegar is

  • n = (0.84×30)/1000
  • n = 0.0252 mol.

the molar mass of vinegar is calculated below.

  • m.m of (HC₂H₃O₂) = [1+(12×2)+(1×3)+(16×2)]
  • m.m = (1+24+3+32]
  • m.m = 60 g/mol.

To calculate the mass of acetic acid, we use the formula below.

  • R.m = n×m.m............. Equation 1

Where

  • R.m = mass of acetic acid.

Substitute these values into equation 1

  • R.m = (0.0252×60)
  • R.m = 1.512 g.

Hence, The mass of the acetic acid is 1.512 g.

Learn more about molarity here: brainly.com/question/20383725

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I need help with these 2 questions
Marta_Voda [28]

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Fiona has to choose a bouquet for her wedding. There is a 98% chance she will use red roses, an 87% chance she will use orchids
brilliants [131]

Answer: 0.99

Explanation:  

Chance she will use red roses: 98%

Chance she will use orchids: 87%

Chance she will use Gerber daisies: 94%

probability she has both roses and orchids: 0.82

Probability she has both Gerber daisies and roses: 0.97  

What is the probability she has Gerber daisies as she has already chosen red roses =?

Probability of having daisies and choosing red roses=  Probability of Daisies and roses/ Probability of red roses)

0.97/0.98 = 0.99


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3 years ago
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Airida [17]

Answer: A. post it

Explanation:

7 0
3 years ago
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