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Inga [223]
3 years ago
8

Here is an addition sentence. (6 + 7) + 8 = 21 Choose an equivalent addition sentence that shows the associative property of add

ition.
Mathematics
2 answers:
Goryan [66]3 years ago
7 0

Answer:

6 + (7+ 8) = 21

Step-by-step explanation:

According to the associative property of addition, the sum of three or more numbers remains the same regardless of how the numbers are grouped.

Have an amazing day!

Svetradugi [14.3K]3 years ago
4 0
The Associative property of addition is where you group the numbers differently with parenthesis. That equation could be written as (8+6) + 7 = 21 or (7+8) + 6 = 21

All you have to do is regroup the numbers
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Answer:

2 and 5

Step-by-step explanation:

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3 years ago
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Can someone guide me through this progress?
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To find the mean you add all the numbers and divide by how many numbers there are so in this case 2+3+4+4+6= 19, there are 5 numbers so divide 19/5
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Put these numbers in order from least to greatest 0.8 1/4 0.9 0.5
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Least 0.5, 1/4, 0.8, 0.9 greatest
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Apply the Distributive property:<br><img src="https://tex.z-dn.net/?f=%20%5Cboxed%7B%5Csf%203%28x-4%29%3D2%28-2x%2B1%29%20%7D" i
jenyasd209 [6]

Answer:

x = 2

Step-by-step explanation:

The left side would be (3x - 12)
The right side would be (-4x+2)

In an equation, 3x - 12 = -4x+2

Combine all the letters on the left and plain numbers on the right,

3x + 4x = 12 + 2

Note: When you transfer to the other side of the equal sign, the number will change its sign.

Simplify the 3x + 4x = 12 + 2,

                     7x = 14

                      x=\frac{14}{7}

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5 0
2 years ago
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What are the solutions of the equation x4 + 95x2 – 500 = 0? Use factoring to solve.
Ivanshal [37]

Answer:

{√5, 10i, -10i}

Step-by-step explanation:

Please use " ^ " to denote exponentiation:

x^4 + 95x^2 – 500 = 0

Temporarily substitute y for x^2:

y^2 + 95y - 500 = 0

Factor this result:

y^2 + 95y - 500 = 0 = (y + 100)(y - 5)

Set each of these factors = to 0 and solve for y:

y + 100 = 0, or y = -100.  Returning to x^2 = y, we get x^2 = -100.  The square root of a negative number is imaginary, so we must omit this possible answer.

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The solution to the given equation is x = √5.

If you want the imaginary roots also, then:

Take the square root of both sides of x^2 = -100, obtaining:

x = ± i(10).

In summary, the solution set (if imaginary solutions are acceptable) is

{√5, 10i, -10i}

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