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blagie [28]
3 years ago
10

The equation a = 640s gives the relationship between s square miles and a acres. James owns 2.5 square miles of farmland. How ma

ny acres does he own?
160 acres

1,600 acres

0.39 acres

3.91 acres

I suck in algebra :( ty
Mathematics
2 answers:
PSYCHO15rus [73]3 years ago
8 0
Hello.

He owns 1,600 acres.

Divide 1,600 by 4 and you get 640s. The answer we need.

Hope it helps :)

larisa [96]3 years ago
7 0
This would be a question that would involve division. 

We do: (1,600 ÷ 4) and therefore, this would give us a= 640s just as we were looking for, and therefore, B would be your correct answer.
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Last week, Delon ran a total of 32 miles. This week, he increased his running distance by 6.4 miles. By what percentage did he i
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Answer:

Step-by-step explanation:

\frac{6.4}{32}*100=\frac{640}{32}\\\\=20

=20%

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3 years ago
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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
) Jess has saved dimes ($ 0.10) and quarters ($ 0.25) in their piggy bank. Define the variables and write a
Mamont248 [21]

Answer:

Quarters = 10

Dimes = 15

Step-by-step explanation:

d = number of dimes, q = number of quarters

d + q = 25 is the equation for number of coins

0.1d + 0.25q = 4 is the equation for value of coins

First, solve for d in terms of q:

d + q = 25

d = 25 - q

Then substitute that into the other equation:

0.1(25 - q) + 0.25q = 4

2.5 - 0.1q + 0.25q = 4

0.15q = 1.5

q = 10

And back to d = 25 - q, d = 25 - 10 = 15

Check the math:

0.1(15) + 10(0.25) = 1.5 + 2.5 = 4

LMK if you have questions

4 0
3 years ago
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