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3 years ago

PLEASE HELP BIG FINALS TEST

Mathematics

1 answer:

Troyanec [42]3 years ago

7 0

Answer:

the length of segment AB is 14

Step-by-step explanation:

If Both shapes are the same just from different angles, that means segments AB and RQ are the same. Here is the equations:

3(x) + 8 = ???

3(2) + 8 = 14

5(x) + 4 = ???

5(2) + 4 = 14

A variable can only represent one number, in this case x was equal to 2, and as a result both solutions, AB and RQ were equivalent to each other, therefore:

Symplified Answer: The Length Of Segment AB Is 14.

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Evaluate the expression.<br> If x=12, y=8, and z=3<br> 4x-yz

MatroZZZ [7]

Answer:

Step-by-step explanation:

Plug in numbers for letters...

4(12) - (8)(3)

48 - 24

7 0

3 years ago

Read 2 more answers

A researcher decides to determine if the type of writing utensil that a student uses while doing their math affects their accura

alexandr1967 [171]

Since the variable type of writing utensil assumes labels and not numbers, it is classified as qualitative.

<h3>What are qualitative and quantitative variables?</h3>

Qualitative variables: Assumes labels or ranks.

Quantitative variables: Assume numerical values.

In this problem, the type of writing utensil has 4 labels: regular pencil, mechanical pencil, pen, whatever.

Hence, since the variable assumes labels and not numbers, it is classified as qualitative.

More can be learned about quantitative and qualitative variables at brainly.com/question/20598475

5 0

3 years ago

About 30% of the population cannot detect any odor when they sniff the steroid androstenone, but they can become sensitive to it

iris [78.8K]

Using the z-distribution, as we are working with a proportion, it is found that there is enough evidence to conclude that the proportion is different of 50%.

<h3>What are the hypothesis tested?</h3>

At the null hypothesis, it is tested if the proportion is of 0.5, that is:

$H_0: p = 0.5$

At the alternative hypothesis, it is tested if the proportion is different of 0.5, that is:

$H_1: p \neq 0.5$ .

<h3>What is the test statistic?</h3>

The test statistic is given by:

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

In which:

$\overline{p}$ is the sample proportion.

p is the proportion tested at the null hypothesis.

n is the sample size.

In this problem, the parameters are:

$p = 0.5, n = 12, \overline{p} = \frac{10}{12} = 0.8333$

Then, the value of the test statistic is as follows:

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

$z = \frac{0.8333 - 0.5}{\sqrt{\frac{0.5(0.5)}{12}}}$

$z = 2.31$

<h3>What is the decision?</h3>

Considering a <em>two-tailed test</em>, as we are testing if the proportion is different of a value, with a <em>significance level of 0.05</em>, the critical value is of $|z^{\ast} = 1.96$ .

Since the absolute value of the test statistic is greater than the critical value for the two-tailed test, it is found that there is enough evidence to conclude that the proportion of participants that had improved androstenone-detection accuracy is different of 50%.

More can be learned about the z-distribution at brainly.com/question/26454209

5 0

2 years ago

When 18 is reduced by two-thirds of a number the result is 12 find the number

Reil [10]

Answer:

2/3s of 18 is 12, 18-12=6

Step-by-step explanation:

4 0

3 years ago

The question is in the picture

Hoochie [10]

Since you’re dealing with a linear equation in slope-intercept form, we know the equation is going to be in the form of y=mx+b.

Therefore, we need to find the slope (“m”) of the line (change in y/change in x), which is rise/run. We also need to find the y-intercept (“b.”)

1.) (0, -3) (1, -1)
We took two points from the line to find the slope. We will use the 2 coordinate pairs to find the slope.

2.) m=(y2-y1)/(x2-x1)
This is the slope “m” formula.

3.) m=( -1+3)/(1-0)
Input the coordinate values into the formula. The +3 you see is due to -(-3)=+3.

4.) m=2/1
We simplified the above formula.

5.) m=2
By division.

We now have the slope or “m.” M=2. Therefore, the equation rises 2 units and runs 1 unit.

Now, finding the y-intercept:

The y-intercept or “b” is where the line intersects the y-axis. It is the starting point of a linear equation.

To find the y-intercept, we need to figure out what the output is when the input is 0. We can see on the table in the picture that with an input of 0, the output is -3.

Therefore, b=-3. This is because an input of 0 means that there is no movement on the x-axis, so we can determine where the where the linear intercepts the y-axis.

Therefore, the equation is y=2x-3, where m=2 and b=-3.

That’s the answer: y=2x-3

4 0

3 years ago