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Rzqust [24]
3 years ago
7

X - 2y + 3z= 7 2x+y+z=4 -3x + 2y – 2z = -10 Solve System of Equations

Mathematics
1 answer:
Bad White [126]3 years ago
8 0

Answer:

(2, -1, 1)

Step-by-step explanation:

Solve for the first variable in one of the equations, then substitute the result into the other equation.

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How do you do these questions?
Tanzania [10]

Answer:

μ ≈ 2.33

σ ≈ 1.25

Step-by-step explanation:

Each person has equal probability of ⅓.

\left[\begin{array}{cc}X&P(X)\\1&\frac{1}{3}\\2&\frac{1}{3}\\4&\frac{1}{3}\end{array}\right]

The mean is the expected value:

μ = E(X) = ∑ X P(X)

μ = (1) (⅓) + (2) (⅓) + (4) (⅓)

μ = ⁷/₃

The standard deviation is:

σ² = ∑ (X−μ)² P(X)

σ² = (1 − ⁷/₃)² (⅓) + (2 − ⁷/₃)² (⅓) + (4 − ⁷/₃)² (⅓)

σ² = ¹⁴/₉

σ ≈ 1.25

3 0
3 years ago
Classify Angle 1 & Angle 2 by choosing the correct term from the choices below.
valkas [14]

Answer:

Vertical

Step-by-step explanation:

Intersecting lines form Vertical angles.

6 0
2 years ago
Special wallpaper that costs $2 per square foot. How much will the wallpaper cost in total?
Llana [10]

well i need to know how much you are buying to know the total price XD

3 0
3 years ago
Read 2 more answers
Type the correct answer in the box. Use numerals instead of words. Tony bought a new car at a cost of $20,000. The value of the
Over [174]

9514 1404 393

Answer:

  A(x) = 20000(0.88)^x

Step-by-step explanation:

The general form of these exponential equations is ...

  A(x) = a·b^x

where 'a' is the initial value, and b is the annual growth factor. x is the elapsed time in years.

The growth factor is ...

  growth factor = 1 + growth rate

Here, the growth rate per year is -12%, so the growth factor is ...

  b = 1 -12% = 88% = 0.88

Of course, the initial value is a=20,000, so the equation is ...

  A(x) = 20000(0.88)^x

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3 years ago
7metros mas 9.40 metros​
Tresset [83]

Answer:

I don't know

Step-by-step explanation:

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3 years ago
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