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
scoundrel [369]
3 years ago
13

Please help me, tomorrow is the deadline.

Mathematics
1 answer:
Helen [10]3 years ago
4 0

I only know the substitutional method so I am going to give you the answers.

1. (remember I am only using the substitutional method, I am doing the method wrong...)

x + y = 10, 3x - y = 2, 5(3x-y) = 5(2), 15x - 5y = 10, 15x -5y = x + y, 14x = 6y, x = 3/7 y , 3/7 y + y = 10, 10/7y = 10, 10 y = 70, y = 7, 14x = 42. x =3

y = 7, x = 3

2. What I know:

x + y = 6

x + 2x = 6

3x = 6

x = 2, y =4

3. I am using a video to help me remember.

x = 2y + 3     2x + 3y = -3.

-3 = 2y - x     -3 = 3y + 2x

0 = - y + 3x,     y = 3x

x = 2(3x) + 3,   x = 6x + 3

-5x = 3,            x = -3/5

y = 3(-3/5)

y = -9/5, x = -3/5

You might be interested in
HELP ASAP.<br><br> Please solve.<br><br> 2 plus or minus the square root of negative 36 over 2
AVprozaik [17]

Answer:

The expression is not defined in a set of real numbers.

The square root of a negative number is not defined in the set of real numbers.

5 0
3 years ago
PLEASE HELP I BEG YOU!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ruslelena [56]

Answer:

R1:   Given

R2:   Subtraction Property of Equality

R3:   Distribute Property

R4:   Addition Property of Equality

R5:   Division Property of Equality

Write a paragraph proof for the following conjecture: m∠1 + m∠2 = m∠4

Prove: m∠3 + m∠1 + m∠2 = 180°

Given: ∠1 + ∠2 = ∠ 4

∠4 + ∠3 must be 180° because they are supplementary

If ∠4 + ∠3 is 180, and ∠1 + ∠2 = ∠4, you can substitute ∠4 in the first equation for ∠1 + ∠2.

Hence, we arrive at the answer ∠1 + ∠2 + ∠3 = 180.

Plz mark brainliest:)

7 0
3 years ago
Find the unit rate. Enter your answer as a mixed number. A fertilizer covers 58 square foot in 12 hour ___ The unit rate is squa
Olegator [25]

Answer:

4 5/6

Step-by-step explanation:

The fraction you have is 58 square feet /12 hour how many times does 12 go into 58 it goes into 58 evenly 4 times 4*12=48

58/12 - 48/12 = 10/12 which can be reduced to 5/6 because 2 goes into 10 and 12 evenly

4 0
3 years ago
What is the correct answer to the math problem<br> 20+30×0+1
Bumek [7]
21
is what I got on my calculator
6 0
3 years ago
Read 2 more answers
Orlando is measuring the angles of a triangle. He measures the first two angles and gets 30° and 70°. What should be the measure
Andrei [34K]
The answer will be B because all three angles of the triangles add up to180 degrees, and we already know the total of two other angles are 100 degrees, which made the unknown angles have 80 degrees. Hope it help!
8 0
3 years ago
Read 2 more answers
Other questions:
  • Five students ran in their schools field day competition. Chris beat Allie by 7 yards but he was 2 yards behind Elena. Derrick f
    9·1 answer
  • A cookie factory uses 1 1/5 bags of flour in each batch of cookies. the factory used 7 1/5 bags of flour yesterday. how many bat
    11·1 answer
  • A student expanded an expression, as shown. Is the student's work correct? Explain why or why not.
    13·2 answers
  • The volume of 10 drops of a liquid is 0.1 fluid ounce. What is the volume of 10,000 drops?
    10·1 answer
  • The area in square feet of a rectangular field is x - 70x + 1200. The width, in feet, is x - 30. What is the length, in feet?
    9·1 answer
  • Solve the following equation 2x=15-1x
    15·2 answers
  • Please answer if correct you get brainiest
    5·1 answer
  • A freezer can be bought on hire purchase by making a deposit of 15% of the cash price which is $2 975.
    14·1 answer
  • BRAINLIEST TO CORRECT
    9·2 answers
  • Ollie took his four freinds to the movies and the total cost was 65$. What was the price for each ticket.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!