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stiks02 [169]
3 years ago
6

I need help here please..! I took a picture of the Multi -Step equations..!

Mathematics
1 answer:
r-ruslan [8.4K]3 years ago
6 0
There are 8 problems in the picture.  What you need is for someone to give you
some tips and solve one or two of them. 
Giving you a bunch of answers and nothing else does NOT help you.

Here are my tips to you:

A).  You're always trying to find the number that the unknown letter must be equal to,
in order to make the equation a true statement.  That's the solution to the equation,
and the 'answer' to the problem.  

B).  Always do what you have to do in order to get the letter all by itself on one side.

C).  Whatever you do to one side of the equation, you must do to the other side.

==========================================

Examples, from the picture:

<u>#3:</u>  <u>8x - 2 = -9 + 7x</u>    What can you do to get the 'x' all alone on one side?

Subtract 7x from each side:    x - 2 = -9

Add 2 to each side:            <u>x = -7</u>
===========================================
<u>#2:</u>  <u>6 = 1 - 2n + 5</u>  

Combine the 1 and the +5 on the right side:      6 = 6 - 2n

What can you do to get the 'n' all alone on one side?

Subtract 6 from each side:      0  =  - 2n

Divide each side by -2 :      <u> 0 = n</u>
===========================================
<u>#5:</u>  <u>4m - 4 = 4m</u>

Subtract 4m from each side:    - 4 = 0

There is no number for 'm' that can make -4 equal to zero.
So this equation has <u>no solution</u>.
(That's OK.  Not every equation must have a solution.)


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lorasvet [3.4K]

Answer:

b= -4.68

Step-by-step explanation:

Hello!

We have to study variables:

Y: Monthly coffe sales

X: Price per pound of coffe ($)

The estimate regression line is

^Yi= a + bxi ∀ (i=1,.....,10)

The slope of the estimated regression line is represented by b.

The formula I'll use to calculate it is:

b= [n∑xiyi -(∑xi)*(∑yi)]/ n∑xi²-(∑xi)²

To calculate b we need to do some auxiliary calculations:

∑xiyi= 4213.15

∑xi= 87.47

∑yi= 545

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Then we replace the formula:

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b= -4.68

I hope you have a SUPER day!

5 0
3 years ago
Which function rule will rotate a geometric figure 90 degrees clockwise
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Step-by-step explanation:

Hope this helps have a lovely day :)

5 0
2 years ago
Sam made a password that consists of one letter followed by two digits. The two digits are different. How many possible password
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8 0
3 years ago
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NEED HELP WITH
Fed [463]
Let the average profit or loss in year 2006 be x millions, 


The average profit for the 8-year period, is the total sum of the profits (or losses) of each year, divided by 8:

so we have:

\displaystyle{ \frac{3.40+2.10+x+0.60+2.10+0.20+1.30+0.75}{8}=1

\displaystyle{\frac{10.45+x}{8}=1

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Answer: the loss in 2006, was 2.45 million dollars

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