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
jasenka [17]
3 years ago
13

Solve 7x+y=50 4x+y=23 simultaneously

Mathematics
2 answers:
Aloiza [94]3 years ago
6 0

<em>so</em><em> </em><em>the</em><em> </em><em>valu</em><em>e</em><em> </em><em>of</em><em> </em><em>x</em><em> </em><em>is</em><em> </em><em>9</em><em> </em><em>and</em><em> </em><em>y</em><em> </em><em>is</em><em> </em><em>-</em><em>1</em><em>3</em><em>.</em>

<em>Hope</em><em> </em><em>this</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em>

Cloud [144]3 years ago
4 0

Answer:

x = 9 and  y = -13

Step-by-step explanation:

7x + y =50.... eq 1

4x + y =23....eq 2

Subtract eq 2 from eq 1

7x + y = 50

-

4x + y = 23

This becomes;

7x - 4x + y - y= 50 -23

3x = 27

Divide both sides by the coefficient of x; 3

x = 9

Slot in the value of x in eq 1

7 (9) + y = 50

63 + y = 50

Subtract 63 from both sides

63 - 63 + y = 50 - 63

y = -13

You might be interested in
During a musical, an orchestra is playing. As the music plays, the volume changes at the beginning of the piece can be modeled b
Ivanshal [37]

Answer:

what

Step-by-step explanation:

...

5 0
3 years ago
Read 2 more answers
What is the equation of the line h Th ya has a y intercept of (0,-3) and passes through the point (-9,-9)
Nikolay [14]

Answer:

The line equation is given as: 3 y = 2 x - 9

Step-by-step explanation:

Here, Y intercept   is at point ( 0.-3)

So, at x = 0, y = -3

or, C  = -3

Also, the point on the equation line is (x,y)  = (-9,-9)

Now, by <u>SLOPE INTERCEPT FORM</u> of a line equation,we get:

y = m x + C   :  m  = slope of line  ......... (1)

So, substituting the values of C and (x,y) , we get:

-9  = m (-9)  + (-3)  

or, -9 + 3  = - 9 m

or, m =  -6/-9  = 2/3

or, m = 2/3

Now, substitute the value of m back in to the line equation (1)

y = m x + C   \implies  y = (\frac{2}{3}) x - 3\\\implies 3y = 2x - 9

Hence, the line equation is given as: 3 y = 2 x - 9.

5 0
3 years ago
2x+2+2x-17=180 what's x?
Alik [6]

Answer:

x= 48.75

Step-by-step explanation:

Add like terms

2x+2x and

2-17

4x-15=180

Now subtract -15 to both sides get x by itself

4x-15+15=180+15

4x=195

Now divide by four to each side to get x by itself again

4x/4 = 195/4

x=48.75

3 0
3 years ago
Read 2 more answers
Write and graph an equation:
Alexxandr [17]

Answer:

y=29*x

Step-by-step explanation:

This problem is a linear function problem. We need at least two points to solve it. After finding two points we will compute the slope and then us the point-slope formula.

If you put 11 gallons of gasoline in your car it will allow you to drive 319 miles, this means that when x= 11 then, y=319. So the first point is (11,319). For the second point you now that if you have no gallons of gasoline then you won't be able to drive so, the second point is (0,0).

Now that we have to points we are able to compute the slope. The formula for the slope is:

m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}.

this way

m = \frac{0-319}{0-11}.

m = 29.

Now that we have the slope, we can use the point-slope formula to get the equation. The point-slope formula is:

(y-y_{1}) = m(x-x_{1}) (here it doesn't matter which point you use, you will get the same result).

Substituting the point (11,319) and the slope:

(y-319) = 29(x-11)

y-319 = 29x-319

y = 29x

And we finaly get the equation!

6 0
3 years ago
Sum of the areas of two squares is 468 m2. If the difference of their perimeters is 24m, determine the sides of the two sqares.
postnew [5]

Answer:

Step-by-step explanation:

square = 468 m² x² + (6+x)² = 468 [Area of a square = side²] x² + (6)² + x² + 2×6×x= 468 [(a+b)²= a²+b²+2ab] 2x² + 36 + 12x= 468 2x² + 12x + 36 - 468= 0 2x² + 12x + 36 - 432 = 0 2(x² +6x - 216)= 0 x² +6x - 216 = 0 x² +18x -12x -216 =0

5 0
2 years ago
Other questions:
  • A dose of medicine is made by diluting one part of concentrate to 5 parts of water. How much of the concentrate should there be
    15·1 answer
  • What is the result when 8x^3+6x^2+15x+7 divides by 2x + 1
    10·1 answer
  • 21 = m + 9; m= 11 solution
    9·1 answer
  • I need help —30 POINTS——<br> 22.) Please!
    15·1 answer
  • Job A pays $32,448 per year. How much would Job A pay per hour based on a 52 weeks working 40 hours per week?
    6·1 answer
  • -13d-8=-8-6d equation
    7·2 answers
  • Convert this mixed number to an improper fraction. 2 2/3
    15·1 answer
  • Work out the mean of these numbers. Please help.
    13·1 answer
  • Convert the following angle from degrees to radians. Express your answer in simplest
    15·1 answer
  • To play a board game, a player spins the pointer of a spinner with four equal sections numbered 1–4, and then flips a fair coin.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!