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2 years ago

Math test! i need help!

Mathematics

1 answer:

FrozenT [24]2 years ago

8 0

Answer:

First option

Step-by-step explanation:

Have a nice day

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{(5,2), (-2,4), (2, -7)} Domain: Range:

Svetradugi [14.3K]

Answer:

Step-by-step explanation:

The domain are all the x values in order, no repeats allowed:

D = {-2, 2, 5}

Same thing for the range, except these are the y values:

R = {-7, 2, 4}

The coordinates stated this way don't match up to what they are in coordinate form, but they don't have to.

5 0

2 years ago

Read 2 more answers

I need help, please and thank you

borishaifa [10]

Answer:

See below ↓

Step-by-step explanation:

Problem

$\frac{5x}{x+7} + \frac{7}{x}$

Work

$\frac{5x(x)+7(x+7)}{x(x+7)}$
$\frac{5x^{2} +7x+49}{x(x+7)}$
The student's mistake was that instead of taking x(x + 7) as the LCM (Least Common Multiple), he took x + 7, which is not possible in this case

Solution

$\frac{5x^{2} +7x+49}{x(x+7)}$

5 0

1 year ago

In a Harris poll of 514 human resource professionals, 90% said that the appearance of a job applicant is most important for a go

Licemer1 [7]

Answer: The interval is 0.9 ± 0.0259 and margin of error is 0.0259

Step-by-step explanation: Confidence interval for a proportion in one sample is the estimate of the proportion of a population. It is calculated following the next steps:

1) Find the proportion $p=\frac{x}{n}$ , in which x is the number of people with the desired condition. In our case, p=0.9;

2) Calculate margin of error, i.e.:

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

z is z-score, which for a 95% confidence, equals 1.96;

Substituting with the data given:

$1.96(\sqrt{\frac{0.9(1-0.9)}{514}})$ = 0.0259

3) Write: p ± $z\sqrt{\frac{p(1-p)}{n}}$

In our case, the interval will be 0.9 ± 0.0259.

Margin of error is the random sampling error in the results of a survey, i.e.,it shows you how far your result will be from the real value. For the Harris poll, margin of error is 0.0259

7 0

2 years ago

What is 4 1/2 - 5 1/4?

alekssr [168]

Answer:

Step-by-step explanation:

well its 4.5-5.25= -0.75

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2 years ago

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Every _____ tessellates. A. Decagon B. Polygon C. Triangle D. Hexagon

olga2289 [7]

The answer is letter B. Every polygon tesselates. Since the word 'tesselate' here means a pattern of shapes put together without any gaps, then I think every polygon tesselates if they are put side by side together in varying amounts and leave absolutely no gaps or spaces between each other.

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2 years ago