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melomori [17]
3 years ago
5

Consider the accompanying matrix as the augmented matrix of a linear system. State in words the next two elementary row operatio

ns that should be performed in the process of solving the system
[1 -5 3 0 -2

0 3 -7 0 4

0 0 1 2 -2]
Mathematics
1 answer:
Lubov Fominskaja [6]3 years ago
4 0

Answer:

The answer is below

Step-by-step explanation:

The next step to solve the system, would be to divide the second row by 3 and we would be left with:  3 * R2

[1 -5 3 0 -2

0 1 -7/3 0 4/3

0 0 1 2 -2]

Then what we will do is multiply row 3 by 7/3 and then subtract it from row 2, that is, R2 - 7/3 * R3, and it would look like this:

[1 -5 3 0 -2

0 1 0 14/3 -10/3

0 0 1 2 -2]

And these would be the next two steps in the process of solving the system.

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Which 3 values would make this inequality true? 48 < 6n
tekilochka [14]

Answer:

The three values are: 9, 10 and 11

5 0
2 years ago
Prove that 3(x+1)(x+7)-(2x+5)² is never positive
scZoUnD [109]

Step-by-step explanation:

3(x + 1)(x + 7) − (2x + 5)²

3(x² + 8x + 7) − (4x² + 20x + 25)

3x² + 24x + 21 − 4x² − 20x − 25

-x² + 4x − 4

-(x² − 4x + 4)

-(x − 2)²

A squared number is never negative (provided x is a real number), so -(x − 2)² is never positive.

3 0
2 years ago
Read 2 more answers
Jean spent $16 on new T-shirts. If each shirt cost the same whole-dollar amount, how many could she have bought?
Kaylis [27]
Well $16 times 16 would be $256.
If each shirt costs $1 then she could buy 16 shirts.
4 0
3 years ago
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Eric collected 1 1/3 times as many beads as Malik in the beginning. If Eric collected 48 more beads and Malik collected 13 more
-BARSIC- [3]

E = \frac{4M}{3} \\E + 48 = 2(M+13)\\E + 48 = 2M + 26\\\frac{4M}{3}+48 = 2M + 26\\4M + 144 = 6M + 78\\2M = 66\\M = 33

At the beginning, Malik had 33 beads, and Eric had 44, making them have 77 beads in total

At the end, Malik had (33 + 13 =) 46 beads and Eric had (44 + 48 = ) 92 beads.

8 0
3 years ago
Read 2 more answers
How to do this plzz​
gtnhenbr [62]

Answer:

88 cm²

Step-by-step explanation:

The perimeter of each square is 22 cm

we should divide by 4 to get the length of the square

22/4=5.5 cm

so we should multiply by 2 to get the length of the rectangle

5.5*2= 11

the perimeter is :

P= 5.5+5.5+5.5+11+11+5.5+5.5+11+11+5.5+5.5+5.5 =  88 cm²

8 0
3 years ago
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