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Paha777 [63]
3 years ago
7

Someone help me please

Mathematics
1 answer:
Juli2301 [7.4K]3 years ago
6 0
A is the correct answer darling
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Sistemas de ecuaciones
kolezko [41]

Answer:

El Dr. Potter aplicó 32 vacunas de polio y 28 de sarampión.

Step-by-step explanation:

- First, the data must be taken into account to create the equations:

  •  X + Y = 60;    (Equation 1)

- Where:

 X = Number of polio vaccines and Y = Number of measles vaccines.

  •  4X + 2Y = 184;     (Equation 2)

Where for each polio vaccine there are 4 doses and for each measles vaccine there are 2 doses.

- We clear the variable that we want to find in each equation:

  • Y = 60 - X;     (And we call it equation 3)
  • Y = (184-4X) / 2;     (And we call it equation 4)

- Now both equations are equalized in terms of the same variable:

  • 60 - X = (184 - 4X) / 2

- Then X is cleared to find its value:

  • 120 - 2X = 184 - 4X
  • 4X - 2X = 184 - 120
  • 2X = 64
  • X = 32

- Now we demonstrate the value of X obtained in equation 1 or 2 to give the values ​​of Y

  • (32) + Y = 60
  • Y = 60 - 32
  • Y = 28

- Finally, both values ​​are used to see if equation 2 gives us the correct data:

  • 4 (32) + 2 (28) = 184
  • 128 + 56 = 184

- The answer is given:

Dr. Potter gave 32 polio and 28 measles vaccines.

6 0
3 years ago
Evaluate -4² please hurry
alexgriva [62]

squaring something multiplies it by itself. -4^2 = -4*-4 = 16

8 0
4 years ago
Read 2 more answers
Solve A = a+b/2 for b
jeka94

Answer:

Step-by-step explanation:

I'm not sure if the right side is \frac{a + b}{2} or a + \frac{b}{2}, so I'll provide an answer for both:

A = \frac{a + b}{2}

2A = a + b

2A - a = b

A = a + \frac{b}{2}

A - a = \frac{b}{2}

2(A - a) = b

2A - 2a = b

6 0
3 years ago
Read 2 more answers
HELP ME PLZZ
Anastaziya [24]

Answer:

2g/cm³

Step-by-step explanation:

p=m/v

mass=80g

volume=4cm x 2cm x 5cm = 40cm²

80g/40cm²=2

density = 2 g/cm³

6 0
3 years ago
What is the difference between 1 1/4 and 3/8
cricket20 [7]
<span>The difference is 1/8

1/4=2/8
3/8-2/8=1/8</span>
8 0
3 years ago
Read 2 more answers
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