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2 years ago

Help me with this please

Mathematics

1 answer:

inessss [21]2 years ago

3 0

Answer:

115

Step-by-step explanation:

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What is the vertex of the parabola y=2x2+20x-15? (5, 135) (-5, -165) (-5, -65)

maria [59]

Answer:

-296=2×2+20×-15that is the answer

Step-by-step explanation:

you need to calculate the equation step by step to get to the answer

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2 years ago

The selling price for houses in a neighborhood in West Richland, WA have an approximately normal distribution with a mean sellin

Liula [17]

The probability that the average selling price of the 35 homes will be within $2000 of the true mean is 0.5753

First, we need to find the z-score and this is expressed according to the formula;

$z=\dfrac{x-\mu}{\sigma}$

x is the sample space

$\mu$ is the mean value

$\sigma$ is the standard deviation

Given the following parameters

Mean = $275,000

Standard deviation = $10,500

If the true mean is $273,000, then;

$z=\dfrac{273,000-275000}{10,500} \\z = \frac{-2000}{10500}\\z= -0.1905$

If the true mean is $277,000

$z=\dfrac{277,000-275000}{10,500} \\z = \frac{2000}{10500}\\z= 0.1905$

This means that the z-score is between -0.1095 and 0.1095

Pr( -0.1095 ≤ z ≤ 0.1095)

According to the z table, the probability that the average selling price of the 35 homes will be within $2000 of the true mean is 0.5753

Learn more here: brainly.com/question/17436641

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2 years ago

Evaluate the function for x = –2a, if a = 3. f(x)= -4x+7

wariber [46]

I got -17; hoped you liked it

7 0

2 years ago

Line AB has endpoints A(3,4) and B(-2,8). What is AB to the nearest tenth

Nadya [2.5K]

Answer:

6.4

Step-by-step explanation:

To find the distance you have to do this formula.

$\sqrt{(x2 -x1)^{2}+(y2-y1)^{2}} \\\sqrt{(-2 -3)^{2} + (8-4)^{2}\\} \\\sqrt{(-5)^{2} + (4)^{2}} \\\sqrt{25 + 16} \\\sqrt{41} \\ \\\sqrt{41} = 6.40312\\6.4$

6.4 is the answer rounded to the nearest tenth.

Hope this helps!!

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2 years ago

What is 9 squared...................

Irina-Kira [14]

Answer:

Step-by-step explanation:

[character limit thing]

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2 years ago