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3 years ago

Evaluate -3x3 - 4x for x = -1. 1 7 -1

Mathematics

1 answer:

soldi70 [24.7K]3 years ago

7 0

The answer is -0.32.

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Josephine was asked to make a one-fiftieth scale model of the new water tower for her town. She constructed the model that is sh

emmasim [6.3K]

Answer:C

Step-by-step explanation:

A scale of one filthiest would be written as 1:50,

this means for every foot of the model would be 50 feet for the actual tower

so you would multiply the dimensions of the tower by 50 get the actual dimensions.

height: 2.25 ft x 50 = 112.50 feet high = 113 feet ( rounded)

width: 1.25 x 50 = 62.5 feet wide = 63 feet (rounded)

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4 years ago

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Based on the family the graph below belongs to, which equation could represent the graph

slamgirl [31]

Answer: Second option y=log(2x)+3

Solution:

Based on the family of graphs shown in the attached file, the equation could represent the graph is y=log(2x)+3

This graph is the graph of the funtion y=log(x) stretched horizontally by a factor of 2 and translated 3 units upward.

7 0

3 years ago

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5 is 20% of what number

Georgia [21]

Five is twenty % of twenty-five

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4 years ago

Insurance companies are interested in knowing the population percent of drivers who always buckle up before riding in a car. The

Tems11 [23]

Answer:

The 84% confidence interval for the population proportion that claim to always buckle up is (0.74, 0.80).

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

They randomly survey 387 drivers and find that 298 claim to always buckle up.

This means that $n = 387, \pi = \frac{298}{387} = 0.77$

84% confidence level

So $\alpha = 0.16$ , z is the value of Z that has a p-value of $1 - \frac{0.16}{2} = 0.92$ , so $Z = 1.405$ .

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.77 - 1.405\sqrt{\frac{0.77*0.23}{387}} = 0.74$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.77 + 1.405\sqrt{\frac{0.77*0.23}{387}} = 0.8$

The 84% confidence interval for the population proportion that claim to always buckle up is (0.74, 0.80).

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3 years ago

Which of the following inequalities matches the graph?

IRINA_888 [86]

Answer:

the answer is C, comment if you need explanation

Step-by-step explanation:

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3 years ago

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