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
aev [14]
3 years ago
8

2x-y=26 3x-2y=42 help

Mathematics
1 answer:
chubhunter [2.5K]3 years ago
3 0

Hey!

Hope this helps...

~~~~~~~~~~~~~~~~~~~~~~~~~

One of these questions are always tricky, one thing you need to know, is you want to try to solve for one variable, and than substitute it in, to find the value of the other variable, and than plug that answer in to the original question to find the value of that other variable.

That probably sounds really confusing, so I'll just do the math, and guide you along the path...

<em>First, we are going to solve for y, and plug it into 3x-2y=42...</em><em />


2x - y = 26

2x = 26 + y

y = 2x - 26

----------------

3x - 2y = 42

3x - 2(2x - 26) = 42

3x - 4x - 52 = 42

-x - 52 = 42

-x = 94

x = -94

-----------------

3x - 2y = 42

3(-94) - 2y = 42

-282 - 2y = 42

-2y = 324

y = -162

~~~~~~~~~~~~~~~~~~

CHECK:

2x - y = 26   

<span />2(-94) - (-162) = 26

-188 + 162 = 26

-26 = 2<span>6<span /><span><span>          </span></span>CORRECT<span /></span><span /><span /><span />

--------------

3x - 2y = 42

3(-94) - 2(-162) = 42

-282 + 324 = 42

42 = 42            <span>CORRECT</span>

You might be interested in
An engineer studying fuel usage collected data on the speed a car traveled (in kilometers per hour) and how much fuel it used (i
Flura [38]

Answer:

c u m and p i s s

Step-by-step explanation:

lol get rekt

4 0
3 years ago
Hehehehehehehehheheheh
elena-s [515]

Answer:

E and B

Step-by-step explanation:

5 0
2 years ago
Read 2 more answers
What is the surface area.
never [62]
The surface area in this equation is 5x4 which is 20
6 0
3 years ago
Read 2 more answers
Solve the initial value problem: y'(x)=(4y(x)+25)^(1/2) ,y(1)=6. you can't really tell, but the '1/2' is the exponent
goblinko [34]

Answer:

y(x)=x^2+5x

Step-by-step explanation:

Given: y'=\sqrt{4y+25}

Initial value: y(1)=6

Let y'=\dfrac{dy}{dx}

\dfrac{dy}{dx}=\sqrt{4y+25}

Variable separable

\dfrac{dy}{\sqrt{4y+25}}=dx

Integrate both sides

\int \dfrac{dy}{\sqrt{4y+25}}=\int dx

\sqrt{4y+25}=2x+C

Initial condition, y(1)=6

\sqrt{4\cdot 6+25}=2\cdot 1+C

C=5

Put C into equation

Solution:

\sqrt{4y+25}=2x+5

or

4y+25=(2x+5)^2

y(x)=\dfrac{1}{4}(2x+5)^2-\dfrac{25}{4}

y(x)=x^2+5x

Hence, The solution is y(x)=\dfrac{1}{4}(2x+5)^2-\dfrac{25}{4} or y(x)=x^2+5x

4 0
3 years ago
Evaluate the expression for the given value of the variables.
zzz [600]
For every c substitute 4 and for every d substitute -2

c=4
d=-2

6c + 5d - 4c - 3d + 3c - 6d

= 6(4)+ 5(-2)- 4(4)- 3(-2)+ 3(4)- 6(-2)

=24+(-10)-16-(-6)+12-(-12)

=24-10-16+6+12+12

=28
7 0
3 years ago
Other questions:
  • Please please help me out..........
    7·1 answer
  • Plz help me answer this ?!?!
    11·1 answer
  • The coordinates of the vertices of quadrilateral ABCD are A(-1, -1), B(-3, 3), C(1, 5), and D(5, 2).
    11·1 answer
  • 9.
    9·1 answer
  • Melissa launches a rocket from a 3-meter-tall platform. The height, h, of the rocket, in meters, can be modeled by the given gra
    6·1 answer
  • Hey can you help me round the fallowing numbers to the nearest 10
    14·1 answer
  • What is the volume if thr cone in cubic inches​
    14·1 answer
  • Find the equation of the line.<br> Use exact numbers.
    15·1 answer
  • A rectangle has a length of 9 inches and a perimeter of 22 inches. What is the width of the rectangle?
    11·1 answer
  • A glass cylinder with a radius of 7cm has water up to a height of 9cm. A metal cube of 5.5cm edge is immersed in it completely.
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!