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3 years ago

Solve the system by using elementary row operations on the equations. Follow the systematic elimination procedure.

Mathematics

1 answer:

Natali5045456 [20]3 years ago

4 0

Answer:

Step-by-step explanation:

The given equation is expressed as

x1 + 2x2 = -24- - - - - - - - --1

x1 + 7x2 = -11- - - - - - - --2

We would eliminate x1 by subtracting equation 2 from equation 1. It becomes

- 5x2 = - 13

Dividing both sides of the equation by - 5, it becomes

- 5x2/- 5 = - 13/- 5

x2 = 13/5

Substituting x2 = 13/5 into equation 2, it becomes

x1 + 7 × 13/5 = -11

x1 + 91/5 = - 11

x1 = - 11 - 91/5

x1 = - 146/5

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iren [92.7K]

Answer:

C) $\frac{2}{4}, \frac{2}{3}, \frac{7}{10}, \frac{4}{5}$

Step-by-step explanation:

Given fractions:

$\frac{2}{4}, \frac{4}{5}, \frac{7}{10},\frac{2}{3}$

To arrange the fractions from least to greatest.

Solution:

In order to arrange the fractions from least to greatest, we need to make the denominators common by taking LCD.

LCD of 4,5,10,3 can be found using their multiples.

4= 4,8,12,16,20,24,28,32,36,40,.........60

5= 5,10,15,20,25,30,.........60

10= 10,20,30,40,50,60

3= 3,6,9..........................60

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Making the denominators common by multiplying same numbers to numerator and denominator.

$\frac{2}{4}=\frac{2\times 15}{4\times 15}=\frac{30}{60}$

$\frac{4}{5}=\frac{4\times12}{5\times 12}=\frac{48}{60}$

$\frac{7}{10}=\frac{7\times 6}{10\times 6}=\frac{42}{60}$

$\frac{2}{3}=\frac{2\times 20}{3\times 20}=\frac{40}{60}$

Comparing the numerators we can arrange the fractions.

$\frac{2}{4}, \frac{2}{3}, \frac{7}{10}, \frac{4}{5}$

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3 years ago

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Answer:

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Step-by-step explanation:

Substitute x = -6 into f(x):

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