Y=2x and 5x-y=9 substitution

Answers

Answer 1

Answer:

3,6

Step-by-step explanation:

Plug 2x(y) into 5x -y = 9

5x -2x = 9

Add like terms.

3x = 9

Divide both sides by 3.

x = 3

Now, in order to find y, plug 3(x) into y = 2x

y = 2(3)

y = 6

Answer 2

The solution of system of equation is x=3 and y=6.

What is 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. LHS = RHS is a common mathematical formula.

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:

y=2x .....................(1)

5x-y=9...............(2)

Now substitute the value of y in equation (2), we get

5x - 2x = 9

3x = 9

Divide both side by 3.

x= 3

and, y= 2x = 6

Learn more about Equation here:

https://brainly.com/question/29657983

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Related Questions

Which function describes the sequence 3, 6, 12, 24.... for n = 1. 2. 3.... ? A. f(n) = 3.11 B. /(n) = x2 + 2 C. f(n) = 3(2-1) D. f(n) = (n - 1)2 + 3​

Answers

Answer:

Tahukah kamu, mengapa motor berhenti di depan lampu merah?

karena motornya direm. Coba kalau nggak direm bisa bahaya tuh.

Tebak binatang apa yang jago renang?

Bebek. Kalau ikan bukan renang tapi menyelam

Kenapa di rel kereta api ditaruh batu?

Soalnya kalau ditaruh duit nanti pada diambil.

The ratio
1 mm represents 1 cm
is the same ratio as
1:10
Complete the following
The ratio
1 cm represents 1 km
is the same ratio as
1 :

Answers

1 : 100,000
Because there are 100cm in a m and 1000m in a km
100 x 1000 = 100,000

PLEASE PLEASE HELP GIVING BRAINALIST AND EXTRA POINTS FOR FIRST PERSON

Answers

Answer:

draw 5 tomatoes at the top and below that draw 2 cucumbers then next to it draw 10 tomatoes and 4 cucumbers. 4/9 4 for every 9

Step-by-step explanation:

The scale of a map says that 3 cm represents 8 km.

What distance on the map (in centimeters) represents an actual distance of 20 kilometers?

What is the actual number of kilometers that is represented by 12 centimeters on the map?

PLEASE HELP ME ASAP I WILL MAKE YOU BRAINIEST!!

Answers

Answer:

Step-by-step explanation:

Problem 1

Set Up the Proportion

3 cm / 8 km = x / 20 km                Cross multiply

3*20 = 8x                                        Combine the left

60 = 8x                                           Divide by 8

60/8 = x

7 4/8  = x

7 1/2 km = x

7.5 km  = x

Problem 2

3 cm / 8km = 12 cm / x                  Cross multiply

3x = 12 * 8                                      Combine the right

3x = 96                                          Divide by 3

3x/3 = 96/3

x = 32 km

Please answer correctly !!!!!!!!!!!!!!!!!!!! Will mark Brianliest !!!!!!!!!!!!!!!!!!

Answers

Repay the national debt, protective tarrifs, national banks, and whiskey tax.

A Bank for the United States.

Jefferson believed that individual states could create charter banks that could distribute money. He also opposed that the constitution did not give the nation government the necessary power to establish a financial bank.

Solve for x.

23=79(6x−36)+9



Enter your answer in the box.

x =

Answers

Answer:

x= 6.02953586.......

Step-by-step explanation:

x= 6.02953586 hope this helps

recipe for two dozen cookies calls for 234cups of sugar. How much sugar is needed to make one dozen cookies? A 38cupsover33, cups B 138cupsove1r, cups C 134cupsover34, cups D 512cups5 and 1 half cup

Answers

Answer:

117 cups

Step-by-step explanation:

two dozen cookies calls for 234cups of sugar

2 dozen cookies = 234 cups of sugar

How much sugar is needed to make one dozen cookies?

Let x = cups of sugar needed

1 dozen cookies = x cups of sugar

2 dozen cookies : 234 cups of sugar = 1 dozen cookies : x cups of sugar

2 : 234 = 1 : x

2 / 234 = 1 / x

Cross product

2*x = 234 * 1

2x = 234

x = 234 / 2

= 117 cups

Your options are wrong because none corresponds with the answer

can someone explain how to calculate a unit rate ​

Answers

Answer:

It's like 60 miles per (1) hour or 20 mL per (1) second. Independent value has to equal 1.

HELP! GIVING OUT BRAINIEST AND 10 POINTS!!!

Answers

Answer:

i think it's 18

Step-by-step explanation:

no need to

Answer:

x=12

Step-by-step explanation:

If you add HG and GE together, you would get the value for HE. You also get HE if you add HF and FE. Setting HG+GE equal to HF+FE gives us a true equation we can use to solve for x. The math is attached.

can u answer this please ​

Answers

-5/2x+2
good luck!!!!!!

if you haven't pulled a knife out on yo siblings you aint real siblings

Answers

Answer:

yup

Step-by-step explanation:

The perimeter of a square with side length s

Answers

Answer:

4s

Step-by-step explanation:

The perimeter of a square is 4 times it's side length.

Formula for a perimeter of a square: [tex]4s[/tex]

s - side length

Hope this helps.

(-12,8), (6,2)
What is the point-slope form of the equation of the line?

Answers

Answer:

x-

Step-by-step explanation:

This is the answer in point slope form

Is (-7,2 a solution

Answers

Answer:

(-7,2) is a solution but where is the question?

Step-by-step explanation:

Answer:

It is.

Step-by-step explanation:

I need the question though....

Put it DB and I'll answer!

(Equation: 8y+10)
If your total cost of fabric is $30, how many total yard of fabric did you purchase?

Answers

8y+10

if the fabric = 30 and yards = y then you would put 8(30) + 10 and you would multiply 8 and 30 and get 240.

Asnwer

8y+10

8(30) +10

240 +10

250

please help i will give brainliest :) question is in picture

Answers

Answer:

C. 43.96

Step-by-step explanation:

2 × 3.14 × 7

Equation is 2×pi×radius

Answer: The answer is B

Step-by-step explanation:

  The formula is 2πr.   2 * 3.14 * 7   6.28 *7 = 43.96

An amusement park charges a $12 parking fee plus 25 per person. What is the total cost for 32 people?​

Answers

Answer:

The total amount for 32 people is 15.36

Step-by-step explanation:

we know that for 25 people is $12 so we need to find how much it would be for one person. you would need to divide $12 / 25. from this you would get 0.48, so for one person it's 48 cents. next you're going to subtract 25 from 32, this leaves you with seven people who aren't in a group of 25. you then multiply 7 × this equals to 3.36, add 3.36 to $12 and you'll get your total 15.36.

WILL GIVE BRAINLIEST

WHAT IS 2+2

RIGHT AWNSER WINS/ HINT 4+18

Answers

Answer:

2+2=4

4+18=22

Step-by-step explanation:

Which table represents a linear function?

Answers

Answer:

bottom right/ fourth table

Step-by-step explanation:

2 7

4 9

6 11

8 13

2 is added to both sides in both columns, making it a linear function

A square and a rectangle have the same area. The length of the rectangle is twelve more than twice times the side of the square. The width of the rectangle is eight less than the side of the square. Let x be the length of the side of the square. Using the information above, what is the value of x?

Answers

Answer:

[tex]x = 12[/tex]

Step-by-step explanation:

Given

Shapes: Square and Rectangle

Square:

[tex]Length = x[/tex]

Rectangle:

[tex]Length = 12 + 2x[/tex]

[tex]Width = x- 8[/tex]

Required

Find x

First, we calculate the area of the square.

[tex]Area = x * x[/tex]

[tex]Area = x^2[/tex]

Next, we calculate the area of the rectangle

[tex]Area = (12 + 2x) * (x - 8)[/tex]

[tex]Area = 12x -96 + 2x^2 - 16x[/tex]

[tex]Area = 2x^2 - 16x + 12x -96[/tex]

[tex]Area = 2x^2 -4x -96[/tex]

Since both areas are equal, we have:

[tex]x^2 = 2x^2 -4x -96[/tex]

Equate to 0

[tex]2x^2 -x^2 -4x -96= 0[/tex]

[tex]x^2 -4x -96= 0[/tex]

Expand:

[tex]x^2 - 12x + 8x -96 = 0[/tex]

[tex]x(x - 12) + 8(x - 12) = 0[/tex]

[tex](x + 8)(x - 12) = 0[/tex]

[tex]x + 8 = 0[/tex] or [tex]x - 12 = 0[/tex]

[tex]x = -8[/tex] or [tex]x = 12[/tex]

But x can't be negative.

Hence:

[tex]x = 12[/tex]

help plzzzzzz it should be easy

Answers

Answer:

uh

Step-by-step explanation:

l

Answer

1.<     2.>

Step-by-step explanation:

1. 9x4/5= 7.2<9

2. 4x6/5= 4.8>4

Graph a line that contains the point (3,-6) and has a slope of
2
khan academy i need it!!

Answers

Answer:

[tex]\boxed {\boxed {\sf y= 2x-12}}[/tex]

Step-by-step explanation:

We are given a slope and a point, so we can use the point-slope equation.

[tex]y-y_1=m(x-x_1)[/tex]

where m is the slope and (x₁, y₁) is the point.

The slope is 2 and the point is (3,-6).

[tex]m= 2\\x_1=3 \\y_1=-6[/tex]

Substitute the values into the formula.

[tex]y--6=2(x-3)[/tex]

[tex]y+6=2(x-3)[/tex]

Distribute the 2 on the right side of the equation.

[tex]y+6=(2*x)+(2*-3)[/tex]

[tex]y+6=2x-6[/tex]

We want to get the line into the form: y=mx+b. We have to isolate y on one side of the equation. 6 is being added to y. The inverse of addition is subtraction; subtract 6 from both sides of the equation.

[tex]y+6-6=2x-6-6[/tex]

[tex]y=2x-6-6[/tex]

[tex]y=2x-12[/tex]

The line is y=2x-12 (slope=2 and y-intercept=-12)

pls help!!!!!!!!!!!!

Answers

Answer:

The answer on the right bottom

Step-by-step explanation:

3/4 × 1/2 = 3/8

None of them have 3 shaded but the right bottom

Therefore that'd be your answer

Answer:

bottom right

Step-by-step explanation:

In order to know the answer, you have to find the product of [tex]\frac{3}{4}[/tex] x [tex]\frac{1}{2}[/tex].

Multiply both numerators and denominators in order to get the answer.

[tex]\frac{3}{4}[/tex] x [tex]\frac{1}{2}[/tex] = [tex]\frac{3}{8}[/tex] (this is the lowest term already)

If you check among the choices, it is only the bottom right choice that shows correct shading of the fraction. The diagram divides the right side into 4 equal parts. If you divide the left side into 4 equal parts like this, you'll surely get 8 equal parts of the total diagram. This represents the denominator, 8. The shaded portion represents the numerator, 3.

2 + 3x²y - 1⁄2y + y - 1

Answers

Answer:

3x²y+0.5y+1

Step-by-step explanation:

2+3x²y -0.5y+y -1

2 and -1 is 1

-0.5y and +y is +0.5y so the answer is...

solve the equation. 3x + 5 = x - 3

Answers

Answer:

x=-4

Step-by-step explanation:

Subtract x from 3x ( 2x )

2x+5=-3

Subtract 5 from -3 ( -8 )

2x=-8

Divide ( -4 )

x=-4

The number one selling item at Sam’s Swim Shop is a beach towel. It is priced at $7.50 , How much will Mrs. Wilson spend if she purchases 4 beach towels and pays 6% sales tax ?

Answers

Mrs. Wilson will pay $31.80 for the beach towels

Answer:

$31.80

Step-by-step explanation:

5x + (x , 3) = 38.4 =?

Answers

This is what X means (I put it in comments too lol)

x = 9.8

Sam has 3x + 4 dollars saved. Tessa has saved 7x + 16 dollars. Together they
have $110 saved. How much money have they each saved individually?

Answers

Step-by-step explanation:

3x + 4 + 7x + 16 = 110

10x = 90

x = 9

therefore, Sam = $31 and Tessa = $79

Topic: Algebraic Equations

If you like to venture further, do check out my insta (learntionary) where I constantly post math tips! Thanks!

Answer:

Sam: 31

Tessa: 79

Step-by-step explanation:

3x+4+7x+16=110

10x+20=110

10x=110-20

10x=90

x=9

Money Sam saved

=3(9)+4

=27+4

=31

Money Tessa saved

=7(9)+16

=63+16

=79

Day 2 question: Get it right and I'll give you brainliest(or if I just like your answer). Who is my favorite American rapper?
A. Kevin Gates
B. Megan Thee Stallion
C. Moneybagg yo
D.Cardi B

Extra Question: If you could be one celebrity for the day then who?
Answer to the last question(which I think was deleted but i'll put it anyway)
My favorite kpop groups order is: B(P1Harmony, Seventeen, Ateez, Stray Kids)

Answers

Answer:

Cardi B

Step-by-step explanation:

and my kpop stan is SEVENTEEN and im a carat, my bias is woozi

Answer  I think its money bagg yo and i would want to be Ariana Grande

Step-by-step explanation:

What is the slope of the line that passes through (2,5) and (6, 7)?

Answers

Answer:

1/2

Step-by-step explanation:

Slope is the change in y over the change in x so:

(7 -5) /(6-2) = (2)/(4) = 1/2

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