Difference means - so 4-(-8)
which also the same as 4+8 so ur answer is 12
Answer:
6x + -12 = 3x + 9
Reorder the terms:
-12 + 6x = 3x + 9
Reorder the terms:
-12 + 6x = 9 + 3x
Solving
-12 + 6x = 9 + 3x
Step-by-step explanation:
12 + 6x = 9 + 3x
-12 + 6x = 9 + 3x
-12 + 6x + -3x = 9 + 3x + -3x
6x + -3x = 3x
-12 + 3x = 9 + 3x + -3x
3x + -3x = 0
-12 + 3x = 9 + 0
-12 + 3x = 9
-12 + 12 + 3x = 9 + 12
-12 + 12 = 0
0 + 3x = 9 + 12
3x = 9 + 12
9 + 12 = 21
3x = 21
Divide each side by 3
x = 7
Answer:
The answer is B. x= -6
Step-by-step explanation:
hope this helps
19 trees should be planted to maximize the total
<h3>How many trees should be planted to maximize the total</h3>
From the question, we have the following parameters:
Number of apples, x = 18
Yield, f(x) = 80 per tree
When the number of apple trees is increased (say by x).
We have:
Trees = 18 + x
The yield decreases by four apples per tree.
So, we have
Yield = 80 - 4x
So, the profit function is
P(x) = Apples * Yield
This gives
P(x) = (18 + x) *(80 - 4x)
Expand the bracket
P(x) = 1440 - 72x + 80x - 4x^2
Differentiate the function
P'(x) = 0 - 72 + 80 - 8x
Evaluate the like terms
P'(x) = 8 - 8x
Set P'(x) to 0
8 - 8x = 0
Divide through by 8
1 - x = 0
Solve for x
x = 1
Recall that:
Trees = 18 + x
So, we have
Trees = 18 + 1
Evaluate
Trees = 19
Hence, 19 trees should be planted to maximize the total
Read more about quadratic functions at:
brainly.com/question/12120831
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