How many equations in the same variables must be in a set to solve a system of linear equations?

Answers

Answer 1

Answer:

Answer:

For a unique solution, there must be as many consistent, independent equations as there are variables.

Step-by-step explanation:

Each equation lets you write an expression for one variable in terms of the others in that equation. That expression can be substituted throughout the system, reducing the number of equations and variables by one each.

After n-1 such substitutions in a system of n equations, there will be one equation left. If that is an equation in one variable, then the solution to the system can be easily found. If more than one variable remains (> n variables in n equations), then the system cannot be solved for definitive values of each of the variables.

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If the equations are inconsistent, there is no solution. If the equations are dependent, then there is no unique solution.

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Find the product. (a-6)^2=

Answers

Answer:

a^2-12a+36

Step-by-step explanation:

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A square has an area of 49 square meters. What is the perimeter of the square? 1) 28 meters 2) 30 meters 3) 32 meters 4) 36 meters

Answers

Answer:

1)28

Step-by-step explanation:

The area of square=49m^2

or,L^2=49

i.e. L=7

also perimeter =4L

or, =4×7

or, perimeter=28m

How do you divide can someone plz tell me

Answers

Just divide
Like 4:2=2

Its pretty easy lets say 2:4 How many times does 2 go into 4 two times see easy

12. The square and rectangle shown below have the same perimeter length Show that the length of the rectangle (3x + 1) centimetres

Answers

Lets call the perimeter P and the length of the rectangle l. The first figure is a square with side length 2x + 2 so P = 4(2x + 2) = 8x + 8. For the rectangle, P = 2l + 2(x + 3) = 2l + 2x + 6. These values both equal P so they must equal each other. 8x + 8 = 2l + 2x + 6. Now we have to solve for l.

8x + 8 = 2l + 2x + 6
8x + 2 = 2l + 2x
6x + 2 = 2l
3x + 1 = l

Help please thank you. first answer choice is yes or no.
other answer choices are: 3 4 5 6

Answers

Hello there! Here are your answers:

Does Kerri's dot plot match the data in the tally table? No.

Look at any of the hours on the chart vs dot plot. Let's take 4 for example. In the tally table, there are 6 class mates. In the plot, there are 3. So no, it is not the same.

The answers for the other problems are in this order (since it's the number of circles on the dot plot at the given hour):

5 - classmates spent 3 hours at the park

3 - classmates spent 4 hours at the park

6- classmates spent 5 hours at the park

4 - classmates spent 6 hours at the park

I hope this was helpful and let me know if you need more help! :) Have a great day! :)

Answer:

the other guy is right

Step-by-step explanation:

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