1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
irakobra [83]
3 years ago
11

Solve each system of eaquasions x+4y=4 -x+2y=8​

Mathematics
2 answers:
bazaltina [42]3 years ago
6 0
X + 4y = 4
-x + 2y = 8


x + 4y - x + 2y = 4 + 8

6y = 12

y = 2


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

(x,y)
(-4,2)
Annette [7]3 years ago
6 0

Answer:

(-4, 2)

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right  

Distributive Property

Equality Properties

  • Multiplication Property of Equality
  • Division Property of Equality
  • Addition Property of Equality
  • Subtraction Property of Equality<u> </u>

<u>Algebra I</u>

  • Terms/Coefficients
  • Coordinates (x, y)
  • Solving systems of equations using systems

Step-by-step explanation:

<u>Step 1: Define Systems</u>

x + 4y = 4

-x + 2y = 8

<u>Step 2: Rewrite Systems</u>

x + 4y = 4

  1. [Subtraction Property of Equality] Subtract 4y on both sides:                    x = 4 - 4y

<u>Step 3: Redefine Systems</u>

x = 4 - 4y

-x + 2y = 8

<u>Step 4: Solve for </u><em><u>y</u></em>

Substitution

  1. Substitute in <em>x</em>:                                                                                                 -(4 - 4y) + 2y = 8
  2. [Distributive Property] Distribute negative:                                                   -4 + 4y + 2y = 8
  3. Combine like terms:                                                                                        -4 + 6y = 8
  4. [Addition Property of Equality] Add 4 on both sides:                                    6y = 12
  5. [Division Property of Equality] Divide 6 on both sides:                                y = 2

<u>Step 5: Solve for </u><em><u>x</u></em>

  1. Define original equation:                                                                                x + 4y = 4
  2. Substitute in <em>y</em>:                                                                                                 x + 4(2) = 4
  3. Multiply:                                                                                                            x + 8 = 4
  4. [Subtraction Property of Equality] Subtract 8 on both sides:                       x = -4
You might be interested in
A taxi service charges a $1.95 flat rate plus $0.55 per mile. Jason only has $12 to spend on a ride. Which graph best represents
Leno4ka [110]

Answer:

If 11.85 is an option then its it

Step-by-step explanation:

5 0
3 years ago
Please help i would greatly appreciate it :D
kumpel [21]
8.
40+105+x=180\\&#10;x=35

9.
The sum of two sides must be greater than the third side.
It can't be 5 because 5+5=10\not>12.
It can't be 7 because 5+7=12\not>12.
It can't be 17 because 5+12=17\not>17.
So it's 12.

10.
a. Turk, McAllister
b. Market, Mission, Howard
c. not sure about this one

8 0
3 years ago
Patti green and her husband are purchasing a condominium for $123,000. They have $15,000 for a down payment. What is the amount
Inessa [10]

Answer:

The amount of their mortgage loan is $108000

Step-by-step explanation:

we are given

total purchasing amount =$123000

down payment amount = $15000

we know that

Mortgage loan amount =  (total purchasing amount)-(down payment amount)

now, we can plug value

Mortgage loan amount = $123000-$15000

Mortgage loan amount =$108000

6 0
3 years ago
Rhonda bought a new laptop for $800. The laptop depreciates, or loses, 20% of its value each year. The value of the laptop at a
zhuklara [117]

As per the problem,

Rhonda bought a new laptop for $800.

The laptop depreciates, or loses, 20% of its value each year.

The value of the laptop at a later time can be found using the formula

A=P(1-r)^t.....(1)

Here we have

P=$800

r=20%=0.20

t=2 years

Substitute the values in equation (1) we get

A=800(1-0.2)^2\\ \\ \Rightarrow A=800(0.8)^2\\ \\ \Rightarrow A=800*0.64\\ \\ \Rightarrow A=512\\

The laptop be worth in two years will be $512.

6 0
3 years ago
Which function is equivalent to y = 3(x + 2)2 + 7?
Tems11 [23]

Answer:

The answer is D

Step-by-step explanation:

I wish i can explan but i got to go, piece

7 0
2 years ago
Other questions:
  • Determine the 12th term of the sequence 5,15,45,...
    11·1 answer
  • Finding the area of a circle with a circumference of 53.41 inches
    8·1 answer
  • One number is 2 less than a second number. twice the second number is 16 more than 4 times the first. find the two numbers.
    6·1 answer
  • 1<br> If a +b = 6 and a= 2, what is b<br><br> A(0<br> B(2<br> C(4<br> D(6
    10·1 answer
  • Can someone help me with Ratios and Proportions? I’m really struggling for Geometry
    5·1 answer
  • Solve for x! show your work please :)
    9·2 answers
  • Pls help if u do urrr the best!!
    5·2 answers
  • Does anyone know hw to find the zeros of this function <br> h(x)=x2 - 4x + 1
    13·1 answer
  • Simplify: 3(x+4) -6x​
    13·2 answers
  • A loaf of bread has 16 slices, Then two pieces were made into toast. The rest were made into sandwiches that use 2 slices of bre
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!