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nikitadnepr [17]
2 years ago
7

Can you please help me find the answer to this algebraic equation~ 5(v–5)=10

Mathematics
1 answer:
joja [24]2 years ago
6 0
5(v-5)=10.
5v-25=10
5v=35
v=7
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Question 1 (5 points): Consider the system of linear equations x1 − 4x2 − x4 = −7 x2 − 2x4 = 3 x4 + 2x5 = 3 (a) Write down the c
Alika [10]

Answer:

Step-by-step explanation:

Given is a system of equations as

x1-4x2 - x4 = -7\\ \\x2 - 2x4 = 3 \\\\x4 + 2x5 = 3

We have 5 variables and 3 equations

a) coefficient matrix of this system is

1   -4   0   -1   0\\

0    1   0   -2   0\\

0    0   0    1    2\\

We find that x3 has no coefficient in any of the equations so we can omit x3 and write as equations for 4 variables as

1   -4     -1   0\\

0    1     -2   0\\

0    0     1    2\\

b) Augmented matrix is

1   -4     -1   0\\  7

0    1     -2   0\\ 3

0    0     1    2\\3

c) For row operations to ehelon form

we can do R1+4R2 = R1

We get

1   0   -9  0 \\  19

0   1  -2   0 \\   3

0   0   1   2  \\   3

Now let us do R1 = R1+9R3 and R2 = R2+2R3

1  0   0   0  \\ 46

0  1   0   0   \\  9

0   0  1   2   \\  3

d) We find that there are infinite solutions to  the system in parametric form, since x4 and x5 are linked with only one equation

e) x1 = 46, x2 = 9, x4+2x5 =3

Or x1 =46, x2 =9, x4 = 3-2x5, x5 = x5 is the parametric solution

 

8 0
3 years ago
What should be added to 3/4+-5/6+1/2 to get 0
monitta

Answer:

-5/12

Step-by-step explanation:

3/4+-5/6+1/2 = 5/12

5/12 - 5/15 = 0

7 0
2 years ago
Solve this using elimination method<br> 5x+25y=60<br> 3x+15y=42
hoa [83]
5x + 25y = 60....multiply by -3
3x + 15y = 42....multiply by 5
-------------------
-15x - 75y = - 180 (result of multiplying by -3)
15x + 75y = 210 (result of multiplying by 5)
-------------------add
0 = 30...incorrect.....this system has no solutions
4 0
2 years ago
Triangle ABC is similar to triangle DEF and has a ratio of similarity of 15:7. If side BC measures 8 mm, how long is side EF?
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15/17 = 8/x find the x
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Jessie estimated the weight of his cat to be 12 pounds. The actual weight of the cat is 15 pounds.
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Answer:

The correct answer is 20%

Hope this helped! :)


^-^


5 0
3 years ago
Read 2 more answers
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