When solving a system of equations, how do you determine which method to use?

Answers

Answer 1

Answer:

The method to solve an equation is

There are three methods used to solve systems of equations: graphing, substitution, and elimination

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

The three methods used to solve systems of equations: graphing, substitution, and elimination

Solving an equation by Graphing :

Simply graph the provided equations and discover the point(s) where they all cross to solve a system. The coordinate of this point will provide you with the values of the variables you are attempting to solve for. This works well when the equations are already in slope-intercept form.

Solving an equation by Substitution:

Substitution is best used when one of the equations is in terms of one of the variables. Once an expression for the variable has been found, substitute or plug it into the other equation where the original variable was to solve for the next variable's integer value. The final step is to substitute the discovered number value for its corresponding variable in the original equation.

Solving an equation by Elimination:

Elimination is the process of combining the equations to obtain an equation with only one variable. This is only possible if the coefficients of one variable in both equations are diametrically opposed and will cancel each other out when put together.

The next step would be to use the equation we devised to determine the variable's value, and then plug that value back into the original equation to determine the remaining variable.

Hence , There are three methods used to solve systems of equations: graphing, substitution, and elimination

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Answer 2

Answer: Substitution is best to use one one or both equations is already solved for one of the variables. Elimitation can be use if all variables have a coefficient other than 1.

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More math help please

Answers

c. it is an or problem so it goes below and it does not have the equal to so it is a dashed line.

The radius of a circle is 28 centimeters. What is the diameter?

Answers

radius
is half of the circle
diameter
is the whole thing inside the circle
since it is a radius, and it is a half of the full circle, we need to double out that number, and multiply by 2.
so here, you said it is 28
take 28, and multiply by 2, if you do every thing correctly, you should get:
56
so then answer would be 56 centimeters.
Hope that this helps you! =)

There are 25 students in a class. 2525 of them walk to school.Which method is a way to find the number of students who walk to school?

Answers

You would have to do 25/25 to get the answer

even IF you meant 25/25, I don't understand what you mean by which method. Could you please clarify? Comment on my answer, and I will comment you your answer.

before a race,you start 4 5/8 behind your friend . At the halfway point,you are 3 2/3 feet ahead of your friend. What is the change in distance between you and your friend from beginning of the race?

Answers

Answer: $(199)/(24)$

Step-by-step explanation:

Given

At the beginning of race you start $4(5)/(8)$ behind your friend .

At the halfway point, you are $3(2)/(3)$ feet ahead of your friend.

Therefore change in distance

initially it is $4(5)/(8)=(37)/(8)$

at half way it is $3(2)/(3)=(11)/(3)$

total change $=(37)/(8)+(11)/(3)=(199)/(24)$

We got this answer, - 8 7/24 feet and also we got the answer of -23/24 feet.

Which expression is equivalent to this expression

t - 6(-2t + 1)

Answers

The correct expression which is equivalent to this expression t - 6(-2t + 1) is,

⇒ 13t - 6

What is an expression?

Mathematical expression is defined as the collection of the numbers variables and functions by using operations like addition, subtraction, multiplication, and division.

We have to given that;

The expression is,

⇒ t - 6 (- 2t + 1)

Now, We can simplify as;

⇒ t - 6 (- 2t + 1)

⇒ t + 12t - 6

⇒ 13t - 6

Thus, The correct expression which is equivalent to this expression

t - 6(-2t + 1) is,

⇒ 13t - 6

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