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Sedbober [7]
3 years ago
9

What is the value of X?​

Mathematics
2 answers:
Gnom [1K]3 years ago
8 0

Answer: the answer is 15

Bond [772]3 years ago
4 0

Answer:

it is 5

Step-by-step explanation:i nailed agelbra and i got a 100% percent on the tesy

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Create a matrix for this system of linear equations, The determinant of the coefficient matrix is
marin [14]

Answer:  The determinant of the coefficient matrix is -15 and x = 3, y = 4, z = 1.

Step-by-step explanation:  The given system of linear equations is :

2x+y+3z=13~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)\\\\x+2y=11~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(ii)\\\\3x+z=10~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(iii)

We are given to find the determinant of the coefficient matrix and to find the values of x, y and z.

The determinant of the co-efficient matrix is given by

D=\begin{vmatrix}2 & 1 & 3\\ 1 & 2 & 0\\ 3 & 0 & 1\end{vmatrix}=2(2-0)+1(0-1)+3(0-6)=4-1-18=-15.

Now, from equations (ii) and (iii), we have

x+2y=11~~~~~\Rightarrow y=\dfrac{11-x}{2}~~~~~~~~~~~~~~~~~~~~~~~~~~(iv)\\\\\\3x+z=10~~~~~~\Rightarrow z=10-3x~~~~~~~~~~~~~~~~~~~~~~~~~(v)

Substituting the value of y and z from equations (iv) and (v) in equation (i), we get

2x+y+3z=13\\\\\Rightarrow 2x+\dfrac{11-x}{2}+3(10-3x)=13\\\\\Rightarrow 4x+11-x+60-18x=26\\\\\Rightarrow -15x+71=26\\\\\Rightarrow -15x=26-71\\\\\Rightarrow -15x=-45\\\\\Rightarrow x=3.

From equations (iv) and (v), we get

y=\dfrac{11-3}{2}=4,\\\\z=10-3\times3=1.

Thus, the determinant of the coefficient matrix is -15 and x = 3, y = 4, z = 1.

3 0
3 years ago
As an unenrolled tax preparer, Daryl is subject to:
-BARSIC- [3]
I think there are missing details in this question. I'll just discuss what an unenrolled tax preparer is.

Unenrolled Tax Preparers are individuals who <span>possess the minimum qualifications required to prepare federal taxes and are granted a Preparer Tax Identification Number (PTIN) but are not Certified Public Accountants (CPA), lawyers, or enrolled agents.

They are only limited to filing only certain types of tax returns and can only represent their client on the basic audit level before the IRS. 

In order for an unenrolled tax preparer to become an enrolled agent, he or she must do the following:
1) Pass a three-part examination before the IRS 
2) Undergo compliance check on their tax history
3) Complete 16 hours of continuing education every year to retain their status. </span>
3 0
3 years ago
Read 2 more answers
A total of 56 student signed up to play in a flag football league.If each team has 10 student , how many more students will need
Ostrovityanka [42]
4.
56/10= 5 r.6
for another team of ten you need 6+_=10
6+4=10
3 0
3 years ago
Read 2 more answers
1. Donnie owes his mother $54.92. She told him he has 4 weeks to pay her
Dovator [93]
$13.73 weekly

54.92 / 4 = 13.73
5 0
3 years ago
Read 2 more answers
Lisa sells cars for a salary of 2500 per month plus 2% commission of her total car sales. What should her total of car sales be
Bumek [7]

Answer:

$50,000

Step-by-step explanation:

Let x = car sales

We multiply x by 0.02 since she earns 2% along with the added $2500 so that she can end up with $3500

3500 = 0.02x + 2500

Subtract 2500 from both sides

3500 - 2500 = 0.02x + 2500 - 2500

1000 = 0.02x

Divide both sides by 0.02

1000/0.02 = 0.02x/0.02

x = 50000

3 0
2 years ago
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