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olchik [2.2K]
4 years ago
13

What is the geometric mean for 4 and 12

Mathematics
1 answer:
Paha777 [63]4 years ago
8 0

Answer:

It's 6.928

Step-by-step explanation:

4 times 12 is 48, and then the square root is 6.928

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A tax assessor wants to assess the mean property tax bill for all homeowners in a certain state. From a survey ten years ago, a
Jet001 [13]

Answer:

The answer is below

Step-by-step explanation:

From the table, the mean (μ) = 1390.75 and the standard deviation (σ) = 518.75

The confidence level (C) = 90% = 0.9

α = 1 - C = 1 - 0.9 = 0.1

α/2 = 0.1 / 2 = 0.05

The z score of α/2 (0.05) is the same as the z score of 0.45 (0.5 - 0.05) which is equal to 1.645.

The margin of error (E) is given as:

E=Z_\frac{\alpha}{2}*\frac{\sigma}{\sqrt{n} }  \\\\E=1.645*\frac{518.75}{\sqrt{14} } =228.07

The confidence interval = μ ± E = 1390.75 ± 228.07 = (1162.68, 1618.82)

The confidence interval is between 1162.68 and 1618.82.

7 0
3 years ago
Juan y maria mezclan cafe de colombia, cafe de brazil, cafe de guinea y cafe de venezuela en paquetes de un kilo. Observa la fra
wel

Answer:

Step-by-step explanation:

Ya que mezclan café colombiano, brasileño, guineano y venezolano en un paquete de un kilo. Igualmente deben agregar los cafés juntos.

Para encontrar la cantidad igual para cada café en 1 kilo, divida 1 kilo y los 4 cafés. Entonces la cantidad sería 1/4 (o 0.25) de café por kilo. La respuesta significa que cada uno de los cuatro cafés pesa 1/4 kilo.

Como cada café representa 1/4 kilo, el café colombiano representa 1/4 kilo.

Si necesita ayuda adicional, comente a continuación.

4 0
4 years ago
For the function y=x^2-4x-5, perform the followingtasks:
lbvjy [14]

Answer:

a. x^2-4x-5= \left(x-2\right)^2-9.

b. The axis of symmetry for {\left(x - 2\right)^{2}} - 9 is x=2.

Step-by-step explanation:

a. The vertex form of a quadratic is given by y=a(x-h)^2+k, where (h, k) is the vertex.  

To convert from y=x^2-4x-5 form to vertex form you use the process of completing the square.

Step 1: Write x^2-4x-5 in the form x^2+2ax+a^2. Add and subtract 4:

x^{2} - 4 x - 5=x^{2} - 4 x + {\left(4\right)} - {4} - 5

Step 2: Complete the square x^2+2ax+a^2=\left(x+a\right)^2

{\left(x^{2} - 4 x + 4\right)} - 9={\left(x - 2\right)^{2}} - 9

b. The graph of a quadratic function is a parabola. The axis of symmetry of a parabola is a vertical line that divides the parabola into two congruent halves. The axis of symmetry always passes through the vertex of the parabola. The x-coordinate of the vertex is the equation of the axis of symmetry of the parabola.

For a quadratic function in standard form, y=a(x-h)^2+k, the axis of symmetry is x=h.

The axis of symmetry for {\left(x - 2\right)^{2}} - 9 is x=2.

Look at the graph shown below.

5 0
3 years ago
Help me please I NEED to pass this
Alina [70]

OPTION C is the correct answer.

Hope it helps you.

4 0
3 years ago
How do I graph equations with different slopes
CaHeK987 [17]
In the equation mx+b, change m, since the variable m represents the slope of the line.
4 0
4 years ago
Read 2 more answers
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