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Marat540 [252]
3 years ago
14

Someone please help

Mathematics
2 answers:
Julli [10]3 years ago
4 0

Step-by-step explanation:

Blue : red

4:6

800:1200

C should replace the star

Oksana_A [137]3 years ago
4 0

Answer:

star=1200

Step-by-step explanation:

4:6

800:?

800÷4

1=200

6=1200

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Given z1 and z2, what is the midpoint?<br><br> z1=5-7i and z2=-9+3i.
sveta [45]

Answer:

7-2i

Step-by-step explanation:

As you're used to do in the real plane, midpoint is the average of Real and Imaginary part. So \frac{5+9}2 +i \frac{-7+3}2 = \frac{14}2+i\frac{-4}2 = 7-2i

7 0
2 years ago
3-(x-3)=25 solve the equation
kherson [118]

Answer:

x= -19

Step-by-step explanation:

3-(x-3)=25

Distributive property to cancel out the paranthesis

3-x+3=25

Add the number

6-x=25

Subtract 6 on both sides

-x=19

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7 0
2 years ago
Mrs. Hanson has 2 pies for a party. She calculates that if she splits the pies evenly among the guests, they will each receive 1
brilliants [131]
There are 32 guests.
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4 0
3 years ago
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AfilCa [17]
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3 0
3 years ago
A scientist needs 4.8 liters of a 12% alcohol solution. She has available a 22% and a 10% solution. How many liters of the 22% a
yanalaym [24]

Answer:

  • 4.0 L of 10%
  • 0.8 L of 22%

Step-by-step explanation:

For mixture problems, it is convenient to define a variable to represent the amount of the greatest contributor. Let x represent the amount of 22% solution in the mix. Then 4.8-x is the amount of 10% solution.

The amount of alcohol in the mix is ...

  0.22x +0.10(4.8-x) = 0.12(4.8)

Eliminating parentheses, we have ...

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Subtracting (0.10)(4.8) and combining x-terms gives ...

  0.12x = 0.02(4.8)

  x = (0.02/0.12)(4.8) = 0.8 . . . . . divide by the x-coefficient

The scientist needs 0.8 L of 22% solution and 4.0 L of 10% solution.

5 0
3 years ago
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