x+2y=3;3x+5y=7 solve by elimination method

Answers

Answer 1

Answer:

(- 1, 2 )

Step-by-step explanation:

Given the 2 equations

x + 2y = 3 → (1)

3x + 5y = 7 → (2)

Multiplying (1) by - 3 and adding to (2) will eliminate the x- term

- 3x - 6y = - 9 → (3)

Add (2) and (3) term by term to eliminate x

0 - y = - 2

- y = - 2 ( multiply both sides by - 1 )

y = 2

Substitute y = 2 into either of the 2 equations and solve for y

Substituting into (1)

x + 2(2) = 3

x + 4 = 3 ( subtract 4 from both sides )

x = - 1

solution is (- 1, 2 )

Answer 2

Answer:

(2,1)

Step-by-step explanation:

A P E X


Related Questions

Assume that BC is tangent to circle A. Find the value of x. Round your answer to the nearest tenth

Answers

Answer:

x ≈ 9.6

Step-by-step explanation:

Δ ABC is right with ∠ C = 90° ( angle between tangent and radius )

Using Pythagoras' identity in the right triangle

x² + 14² = 17²

x² + 196 = 289 ( subtract 196 from both sides )

x² = 93 ( take the square root of both sides )

x = [tex]\sqrt{93}[/tex] ≈ 9.6 ( to the nearest tenth )

2.
A garden is 20 feet long by 10 feet wide. The length and the width of the garden will
each be increased by the same number of feet. This expression represents the
perimeter of the larger garden. please first answer gets brainly thing

Answers

Answer:

200

Step-by-step explanation:

HELLPPPPPPPPPPPPPPPPPPPP!!!!!!!!!!

Answers

Answer:

b.

Step-by-step explanation:

b. or the second answer

whats the difference between coterminal, reference, and rotational angles?

Answers

Answer:

If two angles in standard position have the same terminal side, they are called coterminal angles.

The reference angle is the acute angle (the smallest angle) formed by the terminal side of the given angle and the x-axis.

Angle of Rotation is the measurement of the amount of the angle, by which a figure is rotated counterclockwise about a fixed point, often the center of a circle. Usually clockwise rotation is called as Negative rotation

If two angles in standard position have the same terminal side, they are called coterminal angles.

What is an angle?

An angle is formed when two straight lines or rays meet at a common endpoint. The common point of contact is called the vertex of an angle.

Coterminal angles are those angles that share the terminal side of an angle occupying the standard position. The standard position means that one side of the angle is fixed along the positive x-axis, and the vertex is located at the origin.

The reference angle is the acute angle (the smallest angle) formed by the terminal side of the given angle and the x-axis.

Angle of Rotation is the measurement of the amount of the angle, by which a figure is rotated counterclockwise about a fixed point, often the center of a circle. Usually clockwise rotation is called as Negative rotation.

Hence, if two angles in standard position have the same terminal side, they are called coterminal angles.

To learn more about an angle visit:

https://brainly.com/question/28451077.

#SPJ2

If Amy bought 2 CDs for $14.00 each, a DVD for $24.99, and a video
game for $37.50, how much change would she get back from a $100 bill?

Answers

Answer: Change of $9.51

Step-by-step explanation: Use parenthesis to simplify this, 2(14) + 1(24.99)+1(37.50) = 100. Then subtract accordingly.

Answer:

9.51

Step-by-step explanation:

multiply the cost of the cds by 2, add the DVD and the video game, then subtract that answer with a 100 dollar bill.

What is this math problem?
3x = 6y - 21
6x - 9y = -30

Answers

Answer 1: x=2y−7

Answer 2: x= 3/2y -5

Heart if this helped

Answer:

x=1 and y=4

Step-by-step explanation:

Let's solve your system by substitution.

3x−6y=−21;6x−9y=−30

Step: Solve3x−6y=−21for x:

3x−6y=−21

3x−6y+6y=−21+6y(Add 6y to both sides)

3x=6y−21

x=2y−7

Substitute2y−7for x in6x−9y=−30:

6x−9y=−30

6(2y−7)−9y=−30

3y−42=−30(Simplify both sides of the equation)

3y−42+42=−30+42(Add 42 to both sides)

3y=12

y= 4

Substitute4foryinx=2y−7:

x=2y−7

x=(2)(4)−7

x=1(Simplify both sides of the equation)

I need help with this

Answers

Answer:

12x+24x+18 and 36x+24-6 can both be simplified into 36x+18, meaning the equation is an identity

The points L, M, N and O all lie on the same line segment, in that
order, such that the ratio of LM : MN: NO is equal to 6:1:2. If
LO = 45, find MO.

Answers

3x + 1x + 5x + 36
9x = 36
x = 4
3x = 12
5x = 20

A circle has a radius of 11 meters. What is the area of the circle?

Answers

Answer:

A≈380.13 m²

Step-by-step explanation:

looked it up

Answer:

A= 380.13 m²

Step-by-step explanation:

A=[tex]\pi r^{2}[/tex]

A= [tex]\pi[/tex]x[tex]11^{2}[/tex]

A= 380.13

Use this picture to name one pair of SUPPLEMENTARY angles

Answers

One pair of supplementary angles in the picture : Angle 1 and Angle 5

Hope this helps!

What is the equation of the line with slope −3 and y-intercept 6? Express your answer in slope-intercept form.

A. y = 3x + 6
B. y = −3x − 6
C. y = −3x + 6
D. y = 3x − 6

Answers

Answer:

C. y = -3x +6

Step-by-step explanation:

y = mx + b

m= slope = -3

b = y-intercept = 6

y = -3x + 6

Item 5
Write the word sentence as an inequality.

One plus a number y is no more than −13.

Answers

Answer:

1+xy-13 that is you answer

I don’t know sorry.

Me pueden ayudar? ☹ PROPIEDADES DE LA SUSTRACCIÓN DE NÚMEROS NATURALES: LA RESTA NO CUMPLE CON NINGUNA DE LAS CUATRO PROPIEDADES ENUMERADAS (agrega los contraejemplos) NO ES CERRADA EN EL CONJUNTO DE LOS NATURALES: porque... NO ES CONMUTATIVA: porque... NO ES ASOCIATIVA: porque... NO TIENE ELEMENTO NEUTRO: porque...

Answers

Answer:

(i) La sustracción de números naturales no es cerrada, puesto que no existe el resultado cuando el minuendo en menor que el sustraendo, es decir:

[tex]2 - 5 = -3, -3\notin \mathbb{N}[/tex]

(ii) La sustracción de números naturales no es conmutativa, pues al cambiar las posiciones entre minuendo y sustraendo, se pasar de un resultado contenido en [tex]\mathbb{N}[/tex] a uno no contenido en ese cuerpo. Es decir, el resultado cambia. Es decir:

[tex]5 - 2 = 3[/tex]

[tex]2 - 5 = -3, -3\notin \mathbb{N}[/tex]

(iii) La sustracción de números naturales no asociativa, pues al cambiar la posición de los paréntesis, puede llevar a un resultado distinto o inexistente en [tex]\mathbb{N}[/tex] debido a que el signo afecta a todo lo que está adentro del paréntesis. Es decir:

[tex](6-4) - 1 = 2 - 1 = 1[/tex]

[tex]6 -(4-1) = 6-3 = 3[/tex]

(iv) No tiene elemento neutro pues el neutro aditivo, léase 0, no pertenece a [tex]\mathbb{N}[/tex].

Step-by-step explanation:

(i) La sustracción de números naturales no es cerrada, puesto que no existe el resultado cuando el minuendo en menor que el sustraendo, es decir:

[tex]2 - 5 = -3, -3\notin \mathbb{N}[/tex]

(ii) La sustracción de números naturales no es conmutativa, pues al cambiar las posiciones entre minuendo y sustraendo, se pasar de un resultado contenido en [tex]\mathbb{N}[/tex] a uno no contenido en ese cuerpo. Es decir, el resultado cambia. Es decir:

[tex]5 - 2 = 3[/tex]

[tex]2 - 5 = -3, -3\notin \mathbb{N}[/tex]

(iii) La sustracción de números naturales no asociativa, pues al cambiar la posición de los paréntesis, puede llevar a un resultado distinto o inexistente en [tex]\mathbb{N}[/tex] debido a que el signo afecta a todo lo que está adentro del paréntesis. Es decir:

[tex](6-4) - 1 = 2 - 1 = 1[/tex]

[tex]6 -(4-1) = 6-3 = 3[/tex]

(iv) No tiene elemento neutro pues el neutro aditivo, léase 0, no pertenece a [tex]\mathbb{N}[/tex].

find the value for x

Answers

Answer:

X=22

Step-by-step explanation:

measurement of angle a is right angle

mA=4x+2

90=4x+2

4x=90-2

4x=88

4x/4=88/4

X=22

what is the volume, in cubic centimeters, of a cylinder that has a height of 15 cm and a diameter of 12cm?​

Answers

Answer:

Option 2

[tex]540\pi[/tex]

Step-by-step explanation:

Given,

Diameter of the cylinder = 12cm

Radius of the cylinder = 12cm ÷ 2 = 6cm

Height of the cylinder = 15cm

Therefore,

Volume of the cylinder

[tex] = \pi {r}^{2} h[/tex]

[tex] = \pi \times 6 \times 6 \times 15 {cm}^{3} [/tex]

[tex] = 540\pi \: cubic \: cm[/tex]

Hence,

Option 2 is correct for volume of the cylinder in cubic cm:

[tex]540\pi[/tex]

Without solving, identify whether each of the following equations has a unique solution, no solution, or infinitely many solutions.



2(x−3)=10x−6−8x

1 solution

No Solution

Infinite Solutions

Answers

Answer:

Infinite Solutions

Step-by-step explanation:

Simplify both sides and you will see they are equivalent meaning that it has infinite solutions

The price of a skateboard is reduced by 25%. The original price was $120. Find the new price.

Answers

Answer:

New price = 90 dollars

Price is reduced 25% from 120 so,

120 - 30 = 90

Amount of discount = 30

Please help me out there is no tutorssssss

Answers

Answer:

its 12

heart if it helped!

Ashley's height is 164 cm. She stands 325 cm from a lamp post at night. Her shadow is 100 cm long.
How high is the lamp post?

Answers

the high lamp post is 580

A brick of lead weighs 6,328 grams and has the following dimensions: length of 20 cm, height
of 8 crn, and width of 35 mm. What is the approximate density of the lead? Round to the
nearest tenth

Answers

Answer:

11.3

Step-by-step explanation:

Volume: L * W * H

L = 20

W = 8

H = 35 mm = 35/10 = 3.5 cm

V = 20 * 8 * 3.5

V = 560 cm^3

Density = m/v

Density = 6328 / 560

Density = 11.3

16,when g=4
Answer please

Answers

Answer:

Is this multiplcation cuz its 4

Step-by-step explanation:

4x4=16

Answer:

4X4=16

Step-by-step explanation:

ILL GIVE BRAINLY IF YOU CAN HELP ASAP

Answers

Answer:

D

Step-by-step explanation:

Answer:

The answer is D

Step-by-step explanation:

If you simply add a negative sign to the x coordinate, you get the reflected point.

Hugo puts $200.00 into an account to use for school expenses. The account earns 13% interest, compounded annually. How much will be in the account after 6 years?

Answers

Answer:

y=200(1.13)^6= 416.39

Step-by-step explanation:

Ill give brainiest - please help ASAP with WORK FOR IT please and thank you!! :)

3 pages, with work pleasee

Answers

Step-by-step explanation:

isosceles trapezoidtrapezoidrhombussquarerectangleparallelogramquadrilateral10x+18+62=180 co interior angle

10x=180-80

x=100/10=10

:.x=10

9.

8x+2=7x+14 corresponding angle of parallelogram are equal

8x-7x=14-2

x=12

10.

4x+4=5x+1 corresponding sides of parallelogram are equal

4-1=5x-4x

x=3

11.

4+3x=19corresponding sides of parallelogram are equal

3x=19-4

x=15/3

x=5

which of the following equations represents a line that passes through the points​

Answers

Answer:

C) I only

Step-by-step explanation:

( -1, -2) and (0,4)

Slope:

m=(y2-y1)/(x2-x1)

m=(4+2)/(0+1)

m=6/1

m=6

Slope-intercept:

y - y1 = m(x - x1)

y + 2 = 6(x + 1)

y + 2 = 6x + 6

y = 6x + 4

y - 16 = 6(x - 2)

y - 16 = 6x - 12

y = 6x + 4

helppppp I really need help

Answers

The answer is b I’ve done this before it’s not really that easy lol but yea it’s b

Find the missing side length.

Answers

Answer:

my guess would be 15 because it goes down by 5s

A polynomal of degree of 2 that has zeros -4 and 2 is

Answers

9514 1404 393

Answer:

  f(x) = x^2 +2x -8

Step-by-step explanation:

If p and q are zeros of a quadratic, its factored form is ...

  f(x) = (x -p)(x -q)

For your zeros, the factored form is ...

  f(x) = (x +4)(x -2)

Expanded using the distributive property, this is ...

  f(x) = x(x -2) +4(x -2) = x^2 -2x +4x -8

  f(x) = x^2 +2x -8

Dani owns a small business. There was a profit of $16 on Thursday and a loss of $10 on friday. On saturday there was a loss of $14 and on sunday there was a profit of $25. Find the total loss or profit in the four days.
NO LINKS!

Answers

Answer:

There was profit of $17 think

Step-by-step explanation:

25+16=41

14+10=24

41-24=17

They took down the other question so we're gonna come here ok

What is the factored form of 8y2 + 12y?
a 4 (4y2 + 8y)
b 8y(y + 4)
c 4y (2y + 3)
d 8y (y2 + 4)

Answers

Answer:

Hi! The answer to your questions is C. 4y (2y+3)

Step-by-step explanation:

☆*: .。..。.:*☆☆*: .。..。.:*☆☆*: .。..。.:*☆☆*: .。..。.:*☆

☆Brainliest is greatly appreciated!☆

Hope this helps!!

- Brooklynn Deka

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