1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
OLga [1]
3 years ago
15

Select all the correct answers.

Mathematics
1 answer:
irina1246 [14]3 years ago
6 0

Operations that can be applied to a matrix in the process of Gauss Jordan elimination are :

replacing the row with twice that row

replacing a row with the sum of that row and another row

swapping rows

Step-by-step explanation:

Gauss-Jordan Elimination is a matrix based way used to solve linear equations or to find inverse of a matrix.

The elimentary row(or column) operations that can be used are:

1. Swap any two rows(or colums)

2. Add or subtract scalar multiple of one row(column) to another row(column)

as is done in replacing a row with sum of that row and another row.

3. Multiply any row (or column) entirely by a non zero scalar as is done in replacing the row with twice the row, here scalar used = 2

You might be interested in
Find measure of angle A
Pachacha [2.7K]

Answer:

116°

Step-by-step explanation:

3x-4+9x+17+6x-31=180

18x-18=180

+18 +18

18x=198

18x/18=198/18

x=11

a=9x+17

a=9(11)+17

a=99+17

a=116°

hopefully this helps :)

8 0
3 years ago
Read 2 more answers
The slant height of a regular square pyramid is longer than its altitude.
andrezito [222]
Always

Because the slant length is the longest length when looking at the Pythagoras theorm

In this case the slant is y, with x and y as the height and base
y²=x^{2}+y^{2}

Hence y the slant is the sum of the height and and base and will always be larger 
5 0
4 years ago
Read 2 more answers
Solve for x: 2(x + 3)2 − 4 = 0
Ivan
The answer would be the second one
8 0
3 years ago
Read 2 more answers
Determine whether the statement is always true, sometimes true, or never true. Give an example. (a) Both sides of an equation ca
arsen [322]

Answer:

(A) Always true

(B) Seldom true

Step-by-step explanation:

(A) Both sides of an equation can be multiplied by the same number without this action changing the solution of the equation.

Keyword here is "number".

Multiplying both sides of an equation by an equal quantity (same number) will result in same solution after solving for the unknown in the equation. This is because that numeric quantity can always be removed by dividing both sides of the equation by it or by a factor (or multiple) of it.

EXAMPLE:

For a linear equation, 4x - 6 = 15x

let's find the solution, in other words solve for the unknown value X.

4x - 15x = 6

-11x = 6

x = -6/11

Now multiply both sides of the equation by 3.

3(4x - 6) = 3(15x)

12x - 18 = 45x   ___new equation

Solve for X

12x - 45x = 18

-33x = 18

x = -18/33

Reduce the fraction to its simplest form by looking for a number that can divide both numerator and denominator without remainder. In other words, think of a number that is a factor of 18 and a factor of 33.

That common factor or highest common factor (HCF) is 3.

Go ahead and reduce the fraction.

x will be reduced to -6/11

(B) Both sides of an inequality can seldom be multiplied by the same number, without such action changing the solution set of the equation.

Inequalities are more complex. Operational signs even change sometimes, in the course of finding the solution set of the inequality.

Sometimes, multiplying both sides of an inequality by a given numeric quantity will change its solution set and sometimes, it won't.

5 0
3 years ago
Find the area of the shaded segment of the circle.
vredina [299]

Answer:

Around 5.5 square meters

Step-by-step explanation:

You can start by finding the area of the segment. Since the rest of the circle that is not in the segment is 240 degrees, the segment is 120 degrees or a third of the circle. You can therefore find the area of that segment with the formula \frac{1}{3} \pi r^2 =3\pi square meters. Now, you need to find the area of the triangle inside the sector. This is more difficult than last time, because it is not a 90 degree angle. However, you can solve this by dividing this triangle into two 30-60-90 triangles, which you know how to find the ratio of sides for. In a 30-60-90 triangle, the hypotenuse is twice the length of the smallest leg, and the larger leg is \sqrt{3} times larger than the smaller leg. In this case, these dimensions are a base of \frac{3}{2} for the smaller leg and \frac{3\sqrt{3}}{2} for the larger leg, or the base. Using the triangle area formula and multiplying by 2 (because remember, we divided the big triangle in half), you get \frac{9\sqrt{3}}{4} square meters. Subtracting this from the area of the segment, you get about 5.5 square meters. Hope this helps!

5 0
3 years ago
Other questions:
  • Which numbers are the big 0.3 or 0.03
    14·2 answers
  • Really need help and giving brainlest
    8·1 answer
  • Solve the equation by completing the square. Show your work.<br> v^2-8v-59=-2
    10·1 answer
  • On a business trip you drove300 miles in 5hours driving at the same rate how many miles can you travel in 7hours
    15·1 answer
  • One batch of fruit salad has equal amounts of which kinda of fruit? explain how you decided
    9·1 answer
  • What is the answer?​
    13·1 answer
  • <img src="https://tex.z-dn.net/?f=%203%20%5Csqrt%7B2%20%5Ctimes%202%20%5Csqrt%7B8%20%5Ctimes%20%20%5Csqrt%7B3%20%5Ctimes%20%20%5
    13·1 answer
  • If f(×) = -2x+8, find f(3)
    12·1 answer
  • Kelly earns $23.00 for 4 hours of work. At that rate, how long would she have to work to earn $57.50?
    13·2 answers
  • Dwight Donovan, the president of Finch Enterprises, is considering two investment opportunities. Because of limited resources, h
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!