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
user100 [1]
3 years ago
12

Solve both equations 8x + 7y = 39 4x – 14y = –68

Mathematics
2 answers:
Softa [21]3 years ago
6 0

Answer:

{x,y}={ 1/2, 5)

Step-by-step explanation:

[1]    8x + 7y = 39

[2]    4x - 14y = -68

Solve equation [2] for the variable  x

 [2]    4x = 14y - 68

 [2]    x = 7y/2 - 17

// Plug this in for variable  x  in equation [1]

  [1]    8•(7y/2-17) + 7y = 39

  [1]    35y = 175

// Solve equation [1] for the variable  y

  [1]    35y = 175

  [1]    y = 5

// By now we know this much :

   x = 7y/2-17

   y = 5

// Use the  y  value to solve for  x

   x = (7/2)(5)-17 = 1/2

zaharov [31]3 years ago
4 0

Answer:

x=1/2, y=5

Step-by-step explanation:

This can be solved using substitution!

<em>Hope this helped!</em>

You might be interested in
You are holding a glass of orange juice with ice cubes floating on it.
hammer [34]
You are holding a heterogeneous mixture but once the ice cubes melt the mixture will become homogeneous. A heterogeneous mixture is when you can see and separate the different parts of the item you have. A homogeneous solution is when you can't separate the item you have by physical means<span />
7 0
4 years ago
Read 2 more answers
A flyer has a surface area of 88 square the length of the paper is 11 inches, W width, in inches? A. 4 B. 8 C. 22 E. 968
Romashka [77]

Answer:

B

Step-by-step explanation:

A flyer is the shape of a rectangle ad its area uses the formula A = l*w. Since the area is 88 and the length is 11 inches, then 88 = 11*w. Solve for w.

88/11 = 11w/11

8=w

3 0
3 years ago
Read 2 more answers
How do you solve 0.75(8+e)=2−1.25e ?
mash [69]
Distribute first.
.75 times 8 + .75 times e, which is 6+.75e = 2-1.25e
Then subtract 2 from both sides,
4+.75n=-1.25e
Next subtract .75 from both sides,
4=-2e
Divide both sides by -2, and you will get e= -2. Hope this helps!

6 0
3 years ago
Find the value of x? Pls help
serg [7]

Answer:

Auto rotated. sorry

6 0
3 years ago
In June 2012, Twitter was reporting 400 million tweets per day. Each tweet can consist of up to 140 characters (letter, numbers,
kompoz [17]
Assuming each tweet reaches the max of 140, there would be 56 billion drops of water daily. This would equate to 738,681.7 gallons of water or 98,870.4 cubic feet. This amount of drops of water could fill up almost half of the Goodyear blimp
6 0
3 years ago
Other questions:
  • 120 cards and she gave 6/10 of cards away
    10·1 answer
  • Using long division, what is the quotient of this expression?
    5·1 answer
  • Solve for X: 4/5x+ 4/3 = 2x
    7·1 answer
  • I think I got the answer correct and someone please check it
    13·1 answer
  • Solve 5 over x minus 5 equals the quantity of x over x minus 5, minus five fourths for x and determine if the solution is extran
    14·2 answers
  • Sarah backstrokes at an average speed of 8 meters/second and swims for 250 seconds, how far did she swim?
    11·1 answer
  • Pls help answer, also explain. I will give brainliest
    12·2 answers
  • *If you can give me the correct answer ill brain list*
    10·2 answers
  • Majihinang nilalang whaha Natatawa ako dahil mag switch akownt nako​
    9·2 answers
  • Help me please I will give brainliest.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!