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nexus9112 [7]
3 years ago
11

What is the first step in solving this system of equations by Substitution?

Mathematics
1 answer:
pickupchik [31]3 years ago
6 0

Answer:

x=x+2

Step-by-step explanation:

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Use the expression (a+b)(c-d)+9e(a+b)(c−d)+9eleft parenthesis, a, plus, b, right parenthesis, left parenthesis, c, minus, d, rig
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Answer:

Difference: ¨c-d¨ variable: ¨a¨ coefficient: ¨9¨

Step-by-step explanation:

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Is it possible to form a triangle with side lengths 3, 4, and 5? If so, will it be s
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Find the value of N, P and M
Ket [755]
N = 80 degrees
P = 95 degrees
M = 95 degrees

N and 100 form a 180 degree angle and thus you can solve using subtraction.

P is the same angle as the angle opposite of it. 

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Past experience indicates that the standard deviation of the time it takes for a dentist to perform dental scaling for patients
bagirrra123 [75]

Answer:

n = 110

Step-by-step explanation:

Margin of Error :

Zcritical * s/ sqrt(n)

s = standard deviation = 4

Margin of Error = ±0.75

Zcritical at 95% level of confidence = 1.96

Margin of Error = Zcritical * s/ sqrt(n)

0.75 = 1.96 * 4 / sqrt(n)

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Take the square of both sides

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0.5625 * n = 61.4656

0.5625 = 61.4656

n = 61.4656 / 0.5625

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About 110 samples

6 0
3 years ago
For the remaining portion of the living room not covered by the new flooring, Michelle wants to paint the concrete. After carefu
solong [7]

Answer:

x^2 + 6 = 31

Step-by-step explanation:

Given

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Dimension of unpainted area:

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First, calculate the area of the unpainted space;

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The unpainted area, added to the painted area, equals the total area.

So, we have:

Area + Painted = Total

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Hence, the expression is: x^2 + 6 = 31

5 0
3 years ago
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