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wariber [46]
3 years ago
14

What does n equal in the equation that I've typed out 5n+21?

Mathematics
2 answers:
polet [3.4K]3 years ago
7 0

Answer:

n does not have a defined value, but it has only one value, it is only possible to determined it in an equality let's say that 5n+21=26 there n =1

but we don't know the value

so it stays as 5n+21

vaieri [72.5K]3 years ago
3 0
To solve for n you have to get n by itself. To do that you first subtract 21 then divide by 5.

5n=-21
n=-21/5 or n=-4.2
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mart [117]
We can multiple the 2 to the other side making y = 8/10 which can be reduce to 4/5
6 0
3 years ago
Read 2 more answers
17) Solve the system as matrix equations using inverses. 17) A company produces three models of MP3 players, models A, B, and C.
Vinvika [58]

Answer:

Model A=30, Model B: 20, Model C: 45

Step-by-step explanation:

Let x be the amount of type A mp3 produced, and the amount of model B mp3's produced and z the amount of model C mp3 produced.

Since in total there are 303 hours for electronics work, then:

3.2x+5.4y+2.2z=303

Since in total there are 393 hours for assembly, then:

2.8x+2.4y+5.8z=393

Since in total there are 416 hours for quality assurance, then:

4.4x+3.4y+4.8z=416

Then, the linear system associated to the problem is

3.2x+5.4y+2.2z=303\\2.8x+2.4y+5.8z=393\\4.4x+3.4y+4.8z=416

with coefficient matrix A=\left[\begin{array}{ccc}3.2&5.4&2.2\\2.8&2.4&5.8\\4.4&3.4&4.8\end{array}\right] and vector of constant terms b=\left[\begin{array}{ccc}303\\393\\416\end{array}\right]

Since the determinant of A is equal to 36.704 then A is invertible.

Then for solve the system Ax=b, is enough find the inverse of A and operate

Ax=b\\A^{-1}Ax=A^{-1}b\\x=A^{-1}b

Using Octave we obtain that

A^{-1}=\left[\begin{array}{ccc}-0.22&-0.50 &0.71\\0.33&0.15&-0.34\\-0.028& 0.35&-0.20\end{array}\right]

Then

x=A^{-1}b=\left[\begin{array}{ccc}30\\20\\45\end{array}\right]

This means that 30 mp3's of model A, 20 of model B and 45 of model C must be produced

8 0
3 years ago
Need help on this please help
MrRissso [65]
262 is the answer :)
5 0
3 years ago
.- An employee at the local ice cream parlor asks three customers if they like chocolate ice cream. Identify the sample and the
lys-0071 [83]

Sample is the 3 selected customers; And population is all customers

According to the statement

we have given that a shopkeeper asks 3 customers to taste the chocolate icecream.

And we have to identify the sample and population.

So, A definition of sample is that a

A sample is an outcome of a random experiment. When we sample a random variable, we obtain one specific value out of the set of its possible values. That particular value is called a sample.

And a Population is defines as the is a discrete group of people, animals or things that can be identified by at least one common characteristic for the purposes of data collection and analysis.

So, according to definition Sample is the 3 selected customers; And population is all customers.

Learn more about Sample here brainly.com/question/11073037

#SPJ4

4 0
2 years ago
The total cost of 4 starfish was $7.20. Write and solve an equation to find how much one starfish cost.
Lyrx [107]

Answer:

$1.80

Step-by-step explanation:

4x = 7.20

x = 1.80

7 0
2 years ago
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