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
vesna_86 [32]
3 years ago
13

If y=3x and 2x−4y=3 , then x=

Mathematics
2 answers:
tatiyna3 years ago
3 0

Answer:

x = -3/10

Step-by-step explanation:

Solve for x by substituting y = 3x into the other equation:

2x - 4y = 3

2x - 4(3x) = 3

Simplify and solve for x:

2x - 12x = 3

-10x = 3

x = -3/10

So, x = -3/10

riadik2000 [5.3K]3 years ago
3 0

Answer:

x=-\frac{3}{10}

Step-by-step explanation:

2x - 4y = 3

y = 3x

2x - 4(y = 3x) = 3

2x - 4(3x = 3)

2x - 12x = 3

- 10x = 3

- 10x ÷ - 10 = 3 ÷ - 10

x=-\frac{3}{10}

You might be interested in
How many solutions does the equation 5x + 1 = −5x + 10 have?
storchak [24]

Answer:

9/10 (one solution)

Step-by-step explanation:

6 0
4 years ago
Elizabeth has 87.75 feet of banner paper how many banners can she make that are 11.25 feet long. explain
lana [24]
7.8 or if you are rounding it’s eight
6 0
3 years ago
If 60 marks is 40%, how much is full marks (Show your working out)?
Vitek1552 [10]
' 40% ' means 0.4 .

You said that                           60          = 0.4 x Full

Divide each side by 0.4 :       60 / 0.4  =   1  x Full

                                                       Full  =  150 .
8 0
4 years ago
Read 2 more answers
Find a polar equation for the curve given by the cartesian equation y = 2x 2 .
Aleks04 [339]

The first has no r , only 0 since it is a straight line.

4 0
3 years ago
The length of the longer leg of a right triangle is 6 inches more than twice the length of the shorter leg. The length of the hy
Studentka2010 [4]

9514 1404 393

Answer:

  15 in, 36 in, 39 in

Step-by-step explanation:

The Pythagorean theorem tells us that for short side x, the relation is ...

  (2x +9)² = (2x +6)² +x²

  4x² +36x +81 = 4x² +24x +36 +x²

  x² -12x -45 = 0 . . . . . subtract the left-side expression

  (x -15)(x +3) = 0 . . . . factor

  x = 15 . . . . . . . . . . . the positive value of x that makes a factor zero

The side lengths of the triangle are 15 inches, 36 inches, and 39 inches.

6 0
3 years ago
Other questions:
  • Jacob tapes down a piece of red tape on a basketball court. The piece of tape is 3/5 yard long. He wants to divide it into secti
    13·1 answer
  • Help please!!!!!!!!!??????
    9·2 answers
  • If 3x +y=12 find x when y=-15
    15·1 answer
  • Solve by elimination:<br> 3x+7y=23<br> -3x-7y=-17
    13·1 answer
  • Find the missing dimension. Round your answer to the nearest tenth. Please help me answer this problem. :) thanks.
    11·1 answer
  • -72 by 8<br> A) -9 <br> B) -8 <br> C) 7 <br> D) 8
    15·2 answers
  • Stephen makes 15% commission on all artwork that he sells. If he sold $15,000 worth of artwork, how much commission is he going
    15·2 answers
  • Find the total amount in the compound interest account 1000 is compounded annually at a rate of 11% for 7 years round to the nea
    12·1 answer
  • The check for Tia's brunch was $26.50. Tia left a $5.30 tip. The tip was what PERCENT of the cost of her brunch?
    10·2 answers
  • Please help me with this thanks
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!