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Kruka [31]
3 years ago
8

!!!!!!!!!! 50 POINTS !!!!!!!!!!!! PROBLEM IS ATTACHED.

Mathematics
2 answers:
4vir4ik [10]3 years ago
8 0
(3x-7b)+(2b+2x)= 12b\\ 3x-7b+2b+2x=12b \\ 3x+2x -7b+2b=12b \\ 5x-5b=12b \\ 5x-5b+5b=12b+5b \\ 5x = 17b \\  \\ \boxed {\bf { \frac{17}{5} b}}
Alina [70]3 years ago
5 0

Since you want to solve for one variable in your equation, and since there are two in it altogether, you will end up with the other in your answer, always. I'll show you how to figure out this one.

Let us solve for x.

First step: Add 5b to both sides.

-5b + 5x + 5b = 12b + 5b

5x = 17b

Second step: Divide both sides by 5.

5x/5 = 17b/5

x = 17/5b

Final answer -

x = 17/5b

(Note that the /s are the fraction bars)


Hope this helps! :D


And if you have anymore questions like this that you need help on, let me know!

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Over [174]

Answer:

Paired t test

H0 : μd = 0

H1 : μd > 0

Critical value = 3.499

Test statistic = 2.230

Reject H0 if test statistic > Critical value

Kindly check explanation.

Step-by-step explanation:

Given the data :

110 90 120 98 100 100 90 110

124 100 102 120 110 110 123 120

The hypothesis :

H0 : μd = 0

H1 : μd > 0

Tcritical value, df = n - 1 = 8 - 1 = 7

Tcritical(0.01, 7) = 3.499

The difference, d = (-14,-10,18,-22,-10,-10,-33,-10)

The test statistic :

Xdbar / Sd/√n

The mean difference, Xdbar = Σx / n = - 11.375

The standard deviation of difference, Sd = 14.431

The test statistic :

-11.375 / (14.431/√8) ;

-11.375 / 5.102

= 2.230

Decison :

Reject H0 if test statistic > Critical value

Since ; 2.230 <3.499 ;

We fail to reject the null

7 0
3 years ago
The Montegro Flooring Company can replace 200 square feet of carpet with tile in one day They accept a job replacing carpet with
choli [55]

It will take 5 days for Montegro Flooring Company to complete this job

<u>Solution:</u>

Given, The Montegro Flooring Company can replace 200 square feet of carpet with tile in one day  

They accept a job replacing carpet with tile in an apartment that measures 977.5 square feet  

We have to find how many days will it take the Montegro Flooring Company to complete this job?

Now, according to given information,  

200 square feet ⇒ 1 day

Then, 977.5 square feet ⇒ n days

Now, by chris cross method

\begin{array}{l}{200 \times n=1 \times 977.5} \\\\ {200 n=977.5} \\\\ {n=\frac{977.5}{200}=4.8875}\end{array}

Hence, the company requires 5 days approximately.

5 0
4 years ago
1. How are the intergers and whole number the same ?
Blababa [14]

Answer:

Whole numbers are all natural numbers including 0 e.g. 0, 1, 2, 3, 4… Integers include all whole numbers and their negative counterpart e.g. … -4, -3, -2, -1, 0,1, 2, 3, 4,… Where a and b are both integers.

Step-by-step explanation:

3 0
3 years ago
Is 12.91 a rational number
Musya8 [376]

Answer:

rational

Step-by-step explanation:

5 0
3 years ago
How is 24/27 written as a fraction
castortr0y [4]
24/27 = (24 ÷ 3)/(27 ÷ 3) = 8/9
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