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3 years ago

Graph the following lines and using the graph determine several values of x for which the graph is positive (negative):

Mathematics

1 answer:

DanielleElmas [232]3 years ago

5 0

The equation tells you the line has a y-intercept of -2 and a slope of -0.5. This means it has an x-intercept of -4.

All values of x less than -4 will give positive values for y.

All values of x greater than -4 will give negative values for y.

The graph and a table of some values are shown in the attachment.

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Dr. Wellbee advised his patients to drink 8 eight-ounce glasses of water every day for every 50 pounds of weight. If Kelby weigh

Sever21 [200]

A right triangle has a 30o angle. The leg adjacent to the 30o angle measures 25 inches.

What is the length of the other leg? Round to the nearest tenth.

14.4 in.21.7 in.28.9 in.<span>43.3 in.</span>

5 0

3 years ago

Read 2 more answers

Which of the following is NOT a requirement for testing a claim about two population standard deviations or variances? A. The p

lara [203]

Answer:

B. One of the populations is normally distributed.

Step-by-step explanation:

To test a claim about two population standard deviation or variance, it is imperative that the data meets certain requirements which include :

Randomness : Data must not be biased as such it must be drawn as a random sample from a larger group.

The data must be independent. That is not related to one another, the outcome of one should not rely on the outcome or value of another.

Both groups must be drawn From a population which is normally distributed.

One group being normally distributed by stribuyed while the other isn't a requirement for hypothesis testing in this scenario.

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3 years ago

How does the graph of the function g(x) = 5x + 1 differ from the graph of f(x) = 5*?

elena-14-01-66 [18.8K]

Answer:

C. It is translated up 1 unit.

Step-by-step explanation:

Translations of a function f(x)

To translate a function f(x) a units to the right, we have f(x-a)

To translate a function f(x) a units to the left, we have f(x+a)

To translate a function f(x) a units up, we have f(x) + a

To translate a function f(x) a units down, we have f(x) - a

In this question:

g(x) = 5x + 1

f(x) = 5x

This means that the function g(x) is 1 added to the function f(x), that is, it is translated up 1 units, and the correct answer is given by option c.

7 0

3 years ago

Help me pls I don’t want to fail math

Vladimir79 [104]

Answer: They are proportional.

Explanation: To determine whether a table is proportional just simply notice if there is a number you can get to the next number.

Example: on the x values you multiply from left to right by 2 and get the next number. on the y values you multiply by 1. This table is proportional

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3 years ago

A publisher reports that 55% of their readers own a laptop. A marketing executive wants to test the claim that the percentage is

Irina18 [472]

Answer:

We fail to reject the null hypothesis, we accept H₀

Step-by-step explanation:

Population proportion p₀ = 55 % p₀ = 0,55

Sample size n = 280

Sample mean p = 51 % p = 0,51 q = 0,49

n*p and n*q are both bigger than 10 therefore we can approximate the binomial distribution to a normal distribution

Test Hypothesis

Null Hypothesis H₀ p = p₀

Alternative Hypothesis Hₐ p ≠ p₀

Significance level is α = 0,05 but we have a two-tail test then

α/2 = 0,025

z(c) = - 1,96

Computing z(s)

z(s) = ( p - p₀ ) / √(p*q)/n

z(s) = ( 0,51 - 0,55 ) / √(0,51*0,49)/280

z(s) = - 0,04 * 16,73 / 0,5

z(s) = - 1,34

Comparing

z(s) and z(c)

- 1,34 < - 1,96

| z(s) | < | z(c)|

Then z(s) is in the acceptance region, we accept H₀

6 0

3 years ago