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4 years ago

I need help pleaseeee

Mathematics

1 answer:

notka56 [123]4 years ago

8 0

Simple,

12+-15-6+9

First, -15-6= -21

leaving you...

12+-21+9

21+-21=0

Thus, your answer is, 0.

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Multiply. Write the answer in simplest form.

Roman55 [17]

Answer:

88,306

Step-by-step explanation:

Multiplying times 7 steps:

Step 1. 8 x 7 = 56

Step 2. 1 x 7 = 7

Step 3. Add the 5 from step 1. 7 + 5 = 12

Step 4. 3 x 7 = 21

Step 5. Add the 1 from step 3. 21 + 1 = 22

Step 6. 1 x 7 = 7

Step 7. Add the 2 from step 5. 7 + 2 = 9

Equals = 9226

Steps for times 6:

Step 1. 6 x 8 = 48

Step 2. 1 x 6 = 6

Step 3. Add the 4 from step 3. 6 + 4 = 10

Step 4. 3 x 6 = 18

Step 5. Add the 1 from step 3. 18 + 1 = 19

Step 6. 1 x 6 = 6

Step 7. Add the 1 from step 5.

Equals = 79080

Now add the two 9226 + 79080 = 88, 306

Took me a while to work out and explain lol.

6 0

3 years ago

Draw a model to show 5.5/5

REY [17]

I don't understand the question you are asking sorry.

7 0

3 years ago

In a simple regression analysis (where y is a dependent and x an independent variable), if the y-intercept is positive, then it

Rom4ik [11]

Answer:

$m=\frac{S_{xy}}{S_{xx}}$

Where:

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}$

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}$

$\bar x= \frac{\sum x_i}{n}$

$\bar y= \frac{\sum y_i}{n}$

And we can find the intercept using this:

$b=\bar y -m \bar x$

On this case the correct answer would be:

E. none of the above

Since the intercept has no association between the increase/decrease of the dependent variable respect to the independent variable

Step-by-step explanation:

Assuming the following options:

A. there is a positive correlation between X and Y

B. there is a negative correlation between X and Y

C. if X is increased, Y must also increase

D. if Y is increased, X must also increase

E. none of the above

If we want a model $y = mx +b$ where m represent the lope and b the intercept

$m=\frac{S_{xy}}{S_{xx}}$

Where:

$S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}$

$S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}$

$\bar x= \frac{\sum x_i}{n}$

$\bar y= \frac{\sum y_i}{n}$

And we can find the intercept using this:

$b=\bar y -m \bar x$

On this case the correct answer would be:

E. none of the above

Since the intercept has no association between the increase/decrease of the dependent variable respect to the independent variable

3 0

3 years ago

Asking costs 5 points and then choosing a best answer earns you 3 points!

yKpoI14uk [10]

Thanks this came in handy bc I'm a beginner

4 0

3 years ago

Im so alone. jesus im so alone

Svetllana [295]

Answer:

HA HA HA!!!

Step-by-step explanation:

I am sorry that you feel that way. Maby you should go listento music it help me when I was depresed. Not cristen music though. I love the meem.

4 0

3 years ago