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Whitepunk [10]
2 years ago
13

A business plants trees on 2/4 acre of land each month for 7 months. how many acres of land does the business plant with trees a

fter the 7 months?
a) 2/28
b) 14/28
c) 14/4
d) 30/4

please help. and please take this seriously, thank you.
Mathematics
1 answer:
sweet [91]2 years ago
7 0

Answer:

C) 14/4

Step-by-step explanation:

Multiply the amount of land per month by the number of months.

(2/4)(7) = 14/4 acres

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2x + y - z = 15<br> 4x - 3y + 7z = -11<br> X + y + z = 2<br><br> solve the system of equations
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Answer:

The given system of equations is :

2x + 3y + 5z = 1 -> eq. (1)

3x + 2y + z = 5 -> eq. (2)

Multiplying eq. (1) with 3 and eq. (2) with 2, we get :

6x + 9y + 15z = 3 -> eq. (3)

and, 6x + 4y + 2z = 10 -> eq. (4)

respectively.

Subtracting eq. (4) from eq. (3) :

5y + 13z = -7 -> eq. (5)

Multiplying eq. (1) with 2 and eq. (2) with 3, we get :

4x + 6y + 10z = 2 -> eq. (6)

and, 9x + 6y + 3z = 15 -> eq. (7)

respectively.

Subtracting eq. (7) from eq. (6) :

-5x + 7z = -13 -> eq. (8)

Let z = t, where t is a parameter.

We can write eq. (5) and eq. (8) as :

5y + 13t = -7 & -5x + 7t = -13

i.e., 5y = -7 - 13t & 5x = 13 + 7t

y = -(7/5) - (13t/5) & x = (13/5) + (7t/5)

Therefore, the solution for the given system of equations is :

x = (13/5) + (7t/5)

y = -(7/5) - (13t/5)

z = t

where, t can take any value.

Step-by-step explanation:

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Brilliant_brown [7]
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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Answer:

3.08

Explanation:

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