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mariarad [96]
3 years ago
14

8x + 3y = 13 3.x + 2y = 11

Mathematics
1 answer:
Gekata [30.6K]3 years ago
7 0

Answer:

what it means ,if there is already ans

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A gravimetric experiment was performed to determine the number of moles of sulfate that were present in a solution of sodium sul
LenaWriter [7]
<span>the balanced net ionic equation for the precipitate reaction
</span>
Na2SO4  + Ba(NO3)2 -------------> <span>BaSO4  + Na2(NO3)2

</span><span>the number of moles of sulfate in the sample
M = m /n

M molar mass
m mass
n number of moles
so n =m/M

n = 8.642/233.33=0.037mol

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8 0
4 years ago
Read 2 more answers
Alejandra plans to sew fringe on a scarf. The scarf is shaped like a rectangle. The length of the scarf is 44 inches. The width
PilotLPTM [1.2K]

Answer:

Total fringe needed = 132 inches

Step-by-step explanation:

P.S - The exact question is -

Given - Alejandra plans to sew fringe on a scarf. The scarf is shaped like a rectangle. The length of the scarf is 44 inches. The width is one half the length.

To find - How much fringe does Alejandra need?

Proof -

Total fringe needed = Perimeter of the rectangle.

Now,

We know that,

Perimeter of the Rectangle = 2(Length + Width)

Now,

Given that,

Length = 44 inches

Width = one half the length

          = \frac{1}{2} × 44 = 22 inches

⇒Width = 22 inches

∴ we get

Perimeter of the Rectangle = 2(44 + 22)

                                             = 2(66) = 132 inches

⇒Perimeter of Rectangle = 132 inches

∴ we get

Total fringe needed = Perimeter of the rectangle = 132 inches

⇒Total fringe needed = 132 inches

5 0
3 years ago
You buy painting supplies for $12, and you charge $3 per person to paint faces. how many faces will you need to paint to earn $1
NikAS [45]

Investment = $12

For $15 profit, I have to earn, 12+15 = $27

Charge for 1 person(for paint faces) = 3

multiply by 9,

9 persons= $27

So, 9 person is the answer.

6 0
4 years ago
Read 2 more answers
Help <br>.....................​
Salsk061 [2.6K]

I Think the answer is D!! Please mark me brainliest! Thank you in advance!

6 0
3 years ago
Please help with khan
kodGreya [7K]

Answer:

not 100% but I think it's Step 1

3 0
2 years ago
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