Solve by substitution x-7y=7 6x-7y=-28

Answers

Answer 1

Answer:

(-7, -2)

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDASEquality Properties

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define systems

x - 7y = 7

6x - 7y = -28

Step 2: Rewrite systems

x = 7y + 7

6x - 7y = -28

Step 3: Solve for y

Substitute:                              6(7y + 7) - 7y = -28Distribute 6:                            42y + 42 - 7y = -28Combine like terms:              35y + 42 = -28Isolate y term:                        35y = -70Isolate y:                                 y = -2

Step 4: Solve for x

Define original equation:          x - 7y = 7Substitute in y:                           x - 7(-2) = 7Multiply:                                      x + 14 = 7Isolate x:                                     x = -7

And we have our answer!


Related Questions

A certain company reported selling 5,000 toys during the month of January and expects sales to grow at a rate of 7.5% per month until the end of that year. How many toys should the company expect to sell by the end of June of that year?

Answers

Answer:

Answer is 36,220

Step-by-step explanation:

Find the slope of the line that passes through (9, 10) and (5, 19).
Simplify your answer and write it as a proper fraction, improper fraction, or integer.
Submit

Answers

Answer:

[tex]m=\frac{-9}{4}[/tex]

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Slope Formula: [tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]

Step-by-step explanation:

Step 1: Define

Point (9, 10)

Point (5, 19)

Step 2: Find slope m

Substitute:                    [tex]m=\frac{19-10}{5-9}[/tex]Subtract:                       [tex]m=\frac{9}{-4}[/tex]Simplify:                        [tex]m=\frac{-9}{4}[/tex]

What is the end behavior of the function f(x)=2e^x? Select the two correct answers.

As x approaches infinity, f(x) approaches infinity.

As x approaches negative infinity, f(x) approaches infinity.

As x approaches infinity, f(x) approaches 0.

As x approaches infinity, f(x) approaches negative infinity.

As x approaches negative infinity, f(x) approaches 0.

Answers

Answer:

As x approaches infinity, f(x) approaches infinity. As x approaches negative infinity, f(x) approaches 0.

Step-by-step explanation:

Can u guys help with this​

Answers

Answer:

Turkey Trot

Pumpkin Pie

Family Dinner

Mashed Potatoes

Football

Wish bone

Carve the Turkey

Green Beans

Cornucopia

Black Friday Shopping

Thanks Giving

Table Clothes

November

Drumsticks

Thanksgiving Parade band

Please Consider Brainliest! Hope I helped!

median of 27,29,18,25,32,21,26

Answers

Answer:

arranging the data in ascending order :-

18, 21, 25, 26, 27, 29, 32

hence, the median is = 26

Can someone help me with the questions in the picture?

Answers

Answer:

7)equilateral

8 and 9)scalene

10,11 and 12) isosceles

Step-by-step explanation:

Equilateral triangle has three equal angles and sides

scalene triangle has unequal angles and sides

isosceles has two equal angles and sides

Please Help, this is math problems

Answers

Answer:

1/8 for the first one then 1/6 for the second one

Step-by-step explanation:

 

Help me with my geometry work?

Answers

Answer:

D SSS

Step-by-step explanation:

Answer:

SSS

Step-by-step explanation:

The sides with two lines running through it are equal in length (the lines mean that they are equal)

The sides with one line running through it are equal in length

The third common side is the side that connects the two triangles together.


Find the GCF using any method:
24, 42, and 96

Answers

Answer:

6 is the GCF

Step-by-step explanation:

GCF (24, 42, and 96)

GCF = 6

24 / 6 = 4

42 / 6 = 7

96 / 6 = 16

What method can be used to prove the triangles are congruent?

Answers

The answer would be aas

Answer:

The answer to this question would be AAS (Angle-Angle-Side)

Step-by-step explanation:

The triangles both have the same side and another same angle as shown in the image, but to make this AAS, there must be another angle, which is the center point of both triangles... these are the same because they are vertical angles.

slope intercept
y= 1/2x + 2

Answers

Don't know exactly what you're asking, but I think you're asking what the slope and what the y-intercept is.

1/2x is the slope

Positive 2 is the y-intercept

it y because of the equation mx +b and b is y

Find the side indicated by the variable. Round to the nearest tenth.
PLEASE HELP

Answers

Answer:

d

Step-by-step explanation:

listen bud i am trying to level up so i am doing the challenge 25 questions for 400 points i need 3 brainliest on the way can you help me out with this?

Which expression is equivalent to 6(4v)?

Answers

Answer:

24v

Step-by-step explanation:

simply multiply perform the distributive property. so multiply 6 and 4 and you should get 24. after just add in the v.

pls mark brainlest

Hello!!!

Your answer would in fact Be 24 the steps are super simple what may confuse you is the v it is quite confusing but v is basically a variable that signifies multiplication as it is together with the 4 but this here is an expression because it has nothing equal to it so we have no answer to define what the v is! Also a tip is whenever a number has parenthesis and a number is outside of the parentheses without any sign that signifies multiplication :)!! So as of now if your not learning how to find variable answers then you can basically pretend the v is not needed but have a nice day and I really hope this has helped you!! I have spent quite a while typing this so I hope this is all worth it!!

Identify the range of the function shown in the graph.
10+
8
8
4
-10 -8 18
4
-B
-10

Answers

Answer:

-10?

Step-by-step explanation:

find the solution of these equations
x-9y=39
4x -9y=69

Answers

Answer:

use desmos and you'll find your answer

Step-by-step explanation:

Help me with this plz

Answers

Answer:

zero

Step-by-step explanation:

The coordinates of three vertices of a square are (1, –1), (6, –1), and (6, 4). Fill in each blank to make the statement true. What is the area of the square?

Answers

Answer:

25units²

Step-by-step explanation:

Given the coordinates of three vertices of a square as A(1, –1), B(6, –1), and C(6, 4). The area of the square is expressed as;

A = L² where;

L is the one of the side length of the square.

Note that all the sides of a square are equal;

To get one of the side length, we will find the distance between any two of the coordinates points. Using the coordinates A(1, –1), B(6, –1)

L = AB = √(x2-x1)²+(y2-y1)²

L = √(6-1)²+(-1-(-1))²

L = √5²+0²

L = √25

L = 5

Area of the square = 5²

Area of the square = 25units²

Hence the area of the square is 25units²

A pitcher can hold 5.2 liters of water. How many 0.4 liter glasses of water can be poured from the pitcher? *

Answers

13 glasses can be poured

Hope I helped

Answer:

13

Step-by-step explanation:

number of glasses = total quantity of water / quantity of one cup

n = 5.2/0.4

n = 52/4 (multiply numerator and denominator with 10)

n = 13

therefore it can be poured into 13 cups

Find values for x and y.

Answers

Answer:

B

Step-by-step explanation:

X=90 because p and q perpendicular and   41+2y = 90 so  2y = 49 y=24.5

b for the answerrrrr

Plz help

Find the area of a rectangular movie screen that is 52 feet long and 38 feet high. Use A=LW.

Answers

52x38=1976, 1976 is the answer

Evaluate the expression for x = 3.4, x = 7.6

Answers

u have to multiply both of the numbers

The price of an item yesterday was $180. Today, the price rose to $279. Find the percentage increase.
HELPPP
PLEASSE
DONT SWIPE PAST:,(
I SAW THATTTT

Answers

Answer: 55%

1. 279 - 180 = 99

2. 99 divided by 180 = 0.55

3. 0.55 x 100 is 55.

55 is the percentage

If you were to do the solution to this correctly you would end off with a 55% chance of increasing to ur total.

Which of the following best explains the value of Sine StartFraction pi Over 3 EndFraction on the unit circle below?
A unit circle is shown. A radius with length 1 has an angle measure of StartFraction pi Over 3 EndFraction
sine StartFraction pi Over 3 EndFraction = StartFraction opposite Over hypotenuse EndFractionEquals StartFraction opposite Over 1 EndFraction Equals opposite
The length opposite the angle is the vertical distance from the x-axis on the graph.
sine StartFraction pi Over 3 EndFraction = StartFraction adjacent Over hypotenuse EndFraction = StartFraction adjacent Over 1 EndFraction Equals adjacent
The length adjacent to the angle is the vertical distance from the x-axis on the graph.
Sine StartFraction pi Over 3 EndFraction = StartFraction opposite Over hypotenuse EndFraction = StartFraction opposite Over 1 EndFraction Equals opposite
The length opposite the angle is the horizontal distance from the y-axis on the graph.
Sine StartFraction pi Over 3 EndFraction = StartFraction adjacent Over hypotenuse EndFraction = StartFraction adjacent Over 1 EndFraction Equals adjacent
The length adjacent to the angle is the horizontal distance from the y-axis on the graph.

Answers

Answer:

a. sine StartFraction pi Over 3 EndFraction = StartFraction opposite Over hypotenuse EndFractionEquals StartFraction opposite Over 1 EndFraction  Equals opposite

The length opposite the angle is the vertical distance from the x-axis on the graph.

Step-by-step explanation:

sin (π/3) = opposite/hypotenuse = opposite/1; The length opposite the angle is the vertical distance from the x-axis on the graph.

What is the trigonometric ratio of unit circle?

Unit circle is a circle centered at the origin, (0,0) with radius(r) i.,e r= 1.

The angle π/3 forms an arc of length S and the x-axis and y-axis divide the coordinate plane and the unit circle as it is centered at (0.0).

Also, the terminal side intersect the circle at (x, y). Thus;

sin (π/3) = opposite/hypotenuse = opposite/1

Thus;

sin (π/3) = opposite

Also, the length opposite the angle is the vertical distance from the x-axis on the graph.

Read more about Unit circle at; https://brainly.com/question/4637991

I have a test I'm doing and it makes no sense. Here are some of the questions, and thx for the other answer.
-12 = p - 7
-7b = -35
-5/8w = -9
9/25 = p/125
-3a +4 = -14

Answers

third one is 72/5
I did the reciprocal of -5/8 which is -8/5 to both sides. Multiply -9 and -8/5 to get 72/5

What’s the rate of change of y=5.75x-2.5(x-2)

Answers

Wwwweeewdessjejdhdhhfgfgyychcjdndndndndnnfnfnfnfjfjfjff

5. Find the difference of 785 and 543
785+543

Answers

Step-by-step explanation:

785-543=242

difference means subtract

La distancia que se recorre por carretera para llegar de Guadalajara a Puerto Vallarta, es de aproximadamente 306 km. Si se viaja a una velocidad promedio de 75km/h ¿cuánto tiempo se hará en ese trayecto?

Answers

Responder:

4.08 horas

Explicación paso a paso:

Velocidad = Distancia / Tiempo

Dado

Distancia = 306km

Velocidad = 75 km / h

Necesario

Hora

De la fórmula;

Tiempo = Distancia / velocidad

Sustituye el parámetro dado y obtén el tiempo;

Tiempo = 306 km / 75 km / h

Tiempo = 4.08 horas

Por lo tanto, utilizará 4.08 horas en ese viaje.

I am so confused, I am terrible at math.

Answers

Answer:

D

Step-by-step explanation: when both equations are graphed on the same graph the touch in one place which is (2,1)

Which of the following expressions are equivalent to 20t5⋅2−4t?

There may be more than one correct answer. Select all that apply.

Answers

Answer:mark brain list answers

mark

get 3 point

freee

Step-by-step explanation:

PLEASE PLEASE PLEASE PLEASE HELPP!!what is The function f(x) = 4x – 8 reflected across the y-axis on a coordinate plane

Answers

The answer is:
(2,0) (0, -8)
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