MATHEMATICS MIDDLE SCHOOL

For the following system if you isolated X in the second equation to use the substitution method what expression would you substitute into the first equation? 2x+y= 8
-х – Зу = -12

A. зу + 12
B.-3y + 12
C.зу – 12
D.-3y - 12

Answers

Answer 1
Answer:

Option A. зу + 12 is the right answer

Step-by-step explanation:

The substitution method consists of finding the value of a variable from one equation and then putting it into another equation to find the value of other variable.

Given equations are:

2x+y=8\n-x-3y=-12

We have to isolate x in the 2nd equation

-x-3y=-12

Multiplying equation by -1

x+3y=12

Subtracting 3y from both sides

x+3y-3y=12+3y\nx=12+3y

Hence,

Option A. зу + 12 is the right answer

Keywords: linear equations, Variables

Learn more about linear equations at:

#LearnwithBrainly

Related Questions

Which is bigger 5200ft 145in or 1mi 40in
Rewrite the expression -2a(a+b-5)+3(-5a+2b)+b(6a+b-8)
4x + 3 < -1Cual es la respuesta
The hypotenuse of a right triangle is 26 mm. One leg of the right triangle is 10 mm. What is the length of the other leg? (4 points) Group of answer choices 18 mm 20 mm 24 mm 28 mm
What is the correlatio. coefficient with (2.1)(3.2)(6.8)(7.3)(11.2)(12.6)(13.4)(15.9)

marvin has a chain that is 3 5/12 feet long . he uses 2 1/3 feet of the chain , how much chain is left

Answers

In order to calculate left chain, you need to subtract that as follows:
Left chain = 3 5/12 - 2 1/3
L.C. = 41/12 - 7/3
L.C.= 41-28 / 12
L.C. = 13/12

In short, Your Answer would be 13/12 feet or 1 1/12 feet

Hope this helps!
the answer is 1 1/12, to do that. make 1/3 into 4/12 and subtract 5/12 - 2 4/12= 1 1/12, Hope this helps :)

A radio station requires DJs to play 2 commercials for every 10 songs they play.What is the unit rate of songs to commercial?

Answers

The correct answer for this question is that the unit rate is 5:1. Wecan work this out by simplifying down the 2 commercials to every 10songs ration, so that 10:2 becomes 5:1. We can work this out by halvingthe original ratio to simplify it.

4. The dot plot shows the number of miles Amanda skated each day over two months: Which statement is best supported by the dot plot? Choose ONE and explain your answer.


I. The range of the number of miles Amanda skated in August is less than the range of the number of miles she skated in July.

II. The distribution of data is approximately symmetrical in both sets of data.

III. The mode of the number of miles Amanda skated in July is equal to the mode of the number of miles skated in August.




Answer explanation:


i only need number 4 the others ive done already PLS HURRY IM IN A RUSH ILL GIVE BRAINLYIST

Answers

Answer:

The statements i) and iii) are best supported by the dot plot.

i) The range of the number of miles Amanda skated in

   August is less than the range of the number of miles she

skated in July.

iii) The mode of the number of miles Amanda skated in July

   is equal to the mode of the number of miles skated in

   August.

Step-by-step explanation:

i) The range of the number of miles Amanda skated in August is 1 to 3

  The range of the number of miles Amanda skated in July is 1 to 4

The range of the number of miles Amanda skated in August is less than the range of the number of miles she skated in July.

This is a true statement and this is the correct answer

ii)The distribution of data for the month of July is almost symmetrical but the

   data in August is not.

The range of the number of miles Amanda skated in August is less than the range of the number of miles she skated in July.

This statement is not true.

iii)The mode of the number of miles Amanda skated in July is 1.

   The mode of the number of miles Amanda skated in August is 1.

The mode of the number of miles Amanda skated in July is equal to the mode of the number of miles skated in August.

This is also a true statement.

How many times does 3 go into 70

Answers

3 can go into 70 about... 23.3 times!
I hope I answered your question!:)
it can go in exactly 23 times but not to be specific because that's   23.3

dose this help?

What is the standard form of this number 1.46e-6

Answers

Answer:

1.46e-6=0.00000146

Step-by-step explanation:

Given : Number 1.46e-6

To find : What is the standard form of this number ?

Solution :

We know that, The number given is in scientific form in which "e" represents the number of zeroes placed as decimal to the right.

So,e-6=10^(-6)

In standard form,

1.46e-6=1.46* 10^(-6)

1.46e-6=(1.46)/(1000000)

1.46e-6=0.00000146

Therefore, The standard form is1.46e-6=0.00000146

The number 1.46 * 10^(-6) in scientific notation can be written in standard form as 0.00000146

In scientific notation, a number is expressed as the product of a decimal number (between 1 and 10) and a power of 10.

In this case, 1.46 * 10^(-6) can be interpreted as follows:

1.46 is the decimal number, which is between 1 and 10.

e-6 indicates that we need to multiply 1.46 by 10 raised to the power of -6.

To convert it to standard form, perform the multiplication.

10 raised to the power of -6 is equal to 0.000001.

So, multiplying 1.46 by 0.000001 gives us 0.00000146.

Therefore, the standard form of the number 1.46 * 10^(-6) is 0.00000146.

Learn more about Scientific notation here:

brainly.com/question/19625319

#SPJ6

Solve for y.
8^3-3y=256^4y

Answers

8^(3-3y)=256^(4y)\n\n(2^3)^(3-3y)=(2^8)^(4y)\n\n2^(3(3-3y))=2^(8\cdot4y)\n\n2^(9-9y)=2^(32y)\iff9-9y=32y\n\n-9y-32y=-9\n-41y=-9\ \ \ \ /:(-41)\n\ny=(9)/(41)
Other Questions
Matt Considers whether or not the amount of time students study for a test and the grade on the test are related. He determines that the more they study the higher grade they will get. What type of slope would the line of best fit have? A) negative B) positive C) undefined D) zero
I need help on 9. 10. 11.
What are functions exactly I just kind of want a straightforward answer please
Please Help What is the perimeter of a rhombus with diagonals that have a length of 12 and 9?I need application of rhombus properties and definitions, calculations, and application of perimeter.