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galben [10]
4 years ago
11

7m or 7.7 m which is more precise?

Mathematics
1 answer:
Karolina [17]4 years ago
7 0
7.7 meters is more precise.
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If a polynomial function f(x) has roots 8, 1, and 6i, what must also be a root of f(x)?
ohaa [14]

Answer:

Step-by-step explanation:

complex and irrational roots always occur in pairs.

so -6i is the second root.

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4 years ago
X(x-1)-x^2+2x=5 :))))))
Zina [86]

Answer:

x(x - 1) -  {x}^{2}  + 2x = 5 \\   {x}^{2}  - x -  {x}^{2}   + 2x = 5 \\  \therefore \: x \:  = 5

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3 years ago
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Hello! I'm having a really hard time solving this by Elimination and could really use some help ​
Mamont248 [21]

Answer:

x= 3, y=0, z= 1

Step-by-step explanation:

Let's label the 3 given equations first.

2x +3y +4z= 10 -----(1)

3x +2y -4z= 5 -----(2)

x +4y +2z= 5 -----(3)

(1) +(2):

<em>This</em><em> </em><em>is</em><em> </em><em>to</em><em> </em><em>eliminate</em><em> </em><em>the</em><em> </em><em>z</em><em> </em><em>term</em><em>.</em>

2x +3y +4z +3x +2y -4z= 10 +5

5x +5y= 15

<em>Divide</em><em> </em><em>by</em><em> </em><em>5</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>:</em>

x +y= 3 -----(4)

(3) ×2:

2x +8y +4z= 10 -----(5)

(2) +(5):

<em>This</em><em> </em><em>is</em><em> </em><em>to</em><em> </em><em>eliminate</em><em> </em><em>z</em><em> </em><em>term</em><em>.</em>

3x +2y -4z + 2x +8y +4z= 5 +10

5x +10y= 15

<em>Divide</em><em> </em><em>by</em><em> </em><em>5</em><em> </em><em>throughout</em><em>.</em>

x +2y= 3 -----(6)

(6) -(4):

x +2y -(x +y)= 3 -3

x +2y -x -y= 0

y= 0

subst. y=0 into (4):

x +0= 3

x= 3

subst. x=3, y=0 into (3):

3 +4(0) +2z= 5

3 +2z= 5

2z= 5 -3

2z= 2

z= 2÷2

z= 1

6 0
3 years ago
Solve and graph the coupound inequality ! ILL MARK THE BRAINLIST !!!!
Ivanshal [37]

Answer:

y<-2 or y>= 2

Step-by-step explanation:

y + 3 < 1

y - 3 + 3 < 1 -3

y < -2

2y +1 >= 5

2y - 1 + 1 <= 5 - 1

2y <= 4

2y/2 <= 4/2

y = 2

6 0
3 years ago
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