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
tia_tia [17]
3 years ago
10

Solve the simultaneous equation 2x + 4y=1 3x - 5y=7

Mathematics
1 answer:
nexus9112 [7]3 years ago
6 0

Answer:

x = 3/2 or 1.5.

y = -1/2 or -0.5.

Step-by-step explanation:

Solve for one equation, one variable.

2x + 4y = 1

subtrract 4y from both sides.

2x = 1 - 4y

divide by 2 to get x by itself.

x = 1/2 - 2y

Now that we have this, we can put it into the other equation.

3x - 5y = 7

Substitute variable.

3(1/2 - 2y) - 5y = 7

Distribute the 3.

1.5 - 6y - 5y = 7

Combine terms.

-11y + 1.5 = 7

Subtract by 1.5.

-11y = 5.5

Divide by -11.

y = -1/2, or -0.5.

Now we can find x. Substitute this into the initial equation.

2x + 4y = 1

Substitute variable.

2x + 4(-1/2) = 1

Multiply.

2x + (-2) = 1

Simplify.

2x - 2 = 1

Add 2 to both sides.

2x = 3

Divide by 2.

x = 3/2, or 1.5.

x = 3/2 or 1.5.

y = -1/2 or -0.5.

You might be interested in
Please help w/ geometry!
lara [203]

Answer:

<XYZ = 34

Step-by-step explanation:

Remark

Bisected angles means that the original angle (<XYZ in this case) has been cut exactly in half. The two parts that were created from <XYZ are equal so you need only solve for x, solve one of the halves and then double it.

Equation

3x - 7 = 2x + 1

Solution

3x - 7 = 2x + 1                 Add 7 to both sides

3x - 7+7 = 2x +1+7          Combine

3x = 2x + 8                     Subtract 2x

3x-2x = 2x-2x + 8          Collect like terms on both sides

x = 8

Solution 2

Find one of the bisected parts. You can choose either of the two parts so use 2x + 1

2x + 1

2*8+1

16 + 1

17

WYZ = 17 degrees

Solution 3

Double <WYZ to get <XYZ

<XYZ = 2 * 17

<XYZ = 34 degrees

5 0
3 years ago
What is the length of the diagonal for the given rectangular prism to the nearest whole unit?
kolbaska11 [484]
Given:
length = 6
width = 5
height = 9

Diagonal of a rectangular prism = √(l² + w² + h²)
d = √ 6² + 5² + 9²
d = √ 36 + 25 + 81
d = √ 142
d = 11.916  ROUNDED TO NEAREST WHOLE UNIT D. 12 CM.

Given:
Pyramid base = 12 cm
height = 8 cm

We can use the Pythagorean theorem to look for the slant height because it is the hypotenuse of a right triangle.

a² + b² = c²

a is the height ; b is the base ; c is the slant height.
b = 1/2 of the pyramid base.
b = 12/2 = 6 cm

8² + 6² = c²
64 + 36 = c²
100 = c²
√100 = √c²
10 = c  Answer is letted D. 10 cm.
7 0
3 years ago
X + 6 &lt; 5. Can someone please help me with this question?
Lunna [17]
Answer: x < -1



Step-by-step explanation:

•Solve:

x + 6 < 5


• Subtract 6 on both sides:

x + 6 < 5
-6 -6
—————-

• Result:

x < -1
3 0
3 years ago
Find two integers whose sum is 3 and product is -108.
AleksandrR [38]

Answer:

12 and -9

Step-by-step explanation:

12 x -9 = -108

12 + -9 = 3

7 0
3 years ago
Find x please<br><br><br> 10.3<br><br><br> 9.6<br><br><br> 84<br><br><br> 9
valentinak56 [21]

The 2 small black lines through the sides of the triangle indicate that the 2 sides are the same length.

Because the 2 sides are the same the 2 bottom angles are also the same.


This means that 9x +3 = 84

Now we can solve for x:

9x +3 = 84

Subtract 3 from each side:

9x = 91

Divide both sides by 9:

x = 81 / 9

x = 9

4 0
4 years ago
Other questions:
  • 30 divided by something =35
    11·2 answers
  • Dawn simplified a power correctly and came up with a value of 64.
    9·2 answers
  • What is 2 1/4 as an improper fraction​
    10·2 answers
  • Jessica weighed her dog at the end of each month for three months. At the end of the first month, her dog gained 12.48 pounds. A
    15·1 answer
  • I will give brainaliest if answer is correct.a baseball diamond is square.the distance from home plate to first base is 90 feet.
    14·1 answer
  • What are the foci of the hyperbola represented by the equation (x^2)/64 - (y^2)/32 =1
    7·2 answers
  • Cos ( α ) = 11/8 and sin ( β ) = √ 7/5 . Find cos ( α + β )
    15·1 answer
  • What is the domain of the function graphed below?
    8·1 answer
  • I need help ahhhhhh!
    8·2 answers
  • Triangle ABC is graphed below. Translate the figure left 2 units and down 3 units.
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!