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Sindrei [870]
3 years ago
7

a farmer is trying to determine the proper amounts of two fertilizers for her corn crop. She wants to use a total of 300 pounds

of fertilizer per acre. She also finds that a 3:1 ratio of organic fertilizer to chemical fertilizer is optimal. If she has 9 acres of cornfield, how many pounds of organic fertilizer should she use?
Mathematics
1 answer:
8090 [49]3 years ago
6 0

Answer:

sorry i dont know

Step-by-step explanation:

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Simplify (4x + 12) - (6x - 18)
bixtya [17]

Answer:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :  

                    4*x-12-(6*x-18)=0

Step-by-step explanation:

Pull out like factors :

  -2x + 6  =   -2 • (x - 3)

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3 years ago
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The national debt of the united states is 970 billion dollars. the 1980 census showed 226,504,825 people. about how many dollars
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970,000,000,000/226,504,825 =
4282.4694794
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Point R on the coordinate grid below shows the location of a car in a parking lot. A second car needs to park 7 units above R to
VLD [36.1K]
If this helps I got 2,-3 when I plug it into the graph though it says 2,3
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3 years ago
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The Morris family bought 3 crates of eggs last week. Each crate had 18 eggs. Since then, they have eaten 25 of the eggs. How man
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Answer:

29

Step-by-step explanation:

3 x 8 = 54 - 25 = 29

5 0
3 years ago
Help me please i don't know what to do
astra-53 [7]

Answer:

a. a = 1, b = -5, c = -14

b. a = 1, b = -6, c = 9

c. a = -1, b = -1, c = -3

d. a = 1, b = 0, c = -1

e. a = 1, b = 0, c = -3

Step-by-step explanation:

a. x-ints at 7 and -2

this means that our quadratic equation must factor to:

(x-7)(x+2) = 0

FOIL:

x^2 + 2x - 7x - 14 = 0

Simplify:

x^2 - 5x - 14 = 0

a = 1, b = -5, c = -14

b. one x-int at 3

this means that the equation will factor to:

(x-3)^2=0

FOIL:

x^2 - 3x - 3x +9 = 0

Simplify:

x^2 - 6x + 9 = 0

a = 1, b = -6, c = 9

c. no x-int and negative y must be less than 0

This means that our vertex must be below the x-axis and our parabola must point down

There are many equations for this, but one could be:

-x^2-x-3=0

a = -1, b = -1, c = -3

d. one positive x-int, one negative x-int

We can use any x-intercepts, so let's just use -1 and 1

The equation will factor to:

(x+1)(x-1)=0

This is a perfect square

FOIL:

x^2-1=0

a = 1, b = 0, c = -1

e. x-int at \sqrt{3} , -\sqrt{3}

our equation will factor to:

(x+\sqrt{3} )(x-\sqrt{3)} =0

This is also a perfect square

FOIL and you will get:

x^2 - 3 = 0

a = 1, b = 0, c = -3

4 0
2 years ago
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