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
MissTica
2 years ago
9

4x + 2y=4 and 3x -y= -7

Mathematics
1 answer:
Molodets [167]2 years ago
5 0

Answer:

y =  4

x = -1

Step-by-step explanation:

4x + 2y = 4     Eq. 1

3x - y = -7       Eq. 2

from the  Eq. 2

3x = y - 7

3x + 7 = y        Eq. 3

Replacing the value of the Eq. 3 in the Eq. 1

4x + 2(3x+7) = 4

4x + (2*3x + 2*7) = 4

4x + (6x + 14) = 4

10x + 14 = 4

10x = 4 - 14

10x = - 10

x = -10/10

x = -1

from the Eq. 3

3x + 7 = y

3*-1 + 7 = y

-3 + 7 = y

4 = y

Check:

from the Eq. 1

4x + 2y = 4

4*-1 + 2*4 = 4

-4 + 8 = 4

You might be interested in
Mickey said that 45.7654 rounded to the nearest thousandth is 45.765 and Nicole said that it was 45.766. Who is correct and why?
Nesterboy [21]

Answer:

Mickey

Step-by-step explanation:

Mickey is correct because if you look at the number 45.7654 whenever you round to the nearest thousandth it'll be 45.765

5 is the thousandth place so look to the right. If the number to the right is greater than 5 it'll round to 47.766 but since it's a four ti rounds down.

8 0
3 years ago
Read 2 more answers
The price of a pair of slacks is 29 dollars. What is the price after a 30% discount
Andre45 [30]

Answer:

The pair of slacks would be

C. $20.30

Step-by-step explanation:

5 0
3 years ago
Read 2 more answers
Find the area of the equilateral triangle whose sides are 4 yd.
suter [353]

Answer:

The first one. 4 times square root of 3.

Step-by-step explanation:

The side of the equilateral triangle that represents the height of the triangle will have a length of because it will be opposite the 60o angle. To calculate the area of the triangle, multiply the base (one side of the equilateral triangle) and the height (the perpendicular bisector) and divide by two.

4 0
3 years ago
Read 2 more answers
Activity #2
vesna_86 [32]

Answer:

thats all i know

Step-by-step explanation:

1.5+8

2.3×4

4 0
2 years ago
Read 2 more answers
Passe os numeros a seguir para notação cientifica.
loris [4]

Answer:

ingles Hablas ingles?

5 0
3 years ago
Other questions:
  • Which rectangle if translated 3 units left and 10 units down and then reflected over the line x = -5 will result in rectangle E?
    15·1 answer
  • - 3x + 9 - 4 = x + 3 + 2x​
    8·2 answers
  • Which shape can have only one symmetry line?
    13·2 answers
  • Tamika makes a 5.5% commission selling electronics. How much commission does she make if she sells a flat-screen TV for $10,000?
    10·2 answers
  • If x<br><img src="https://tex.z-dn.net/?f=%20%5Cinfty%20" id="TexFormula1" title=" \infty " alt=" \infty " align="absmiddle" cla
    15·1 answer
  • Miu will solve the system of equations below using the elimination method.
    11·1 answer
  • #2. A field of grass feeds 36 cows for 4 days. How<br> many days would the same field feed 20 cows?
    12·1 answer
  • Find the slope of the following graph.
    6·2 answers
  • At the local pet store, zebrafish cost $2.15 each, and neon tetras cost $2.30 each. If Ernesto bought 13 fish for a total cost o
    10·1 answer
  • find the probability of making a five digit number form 2,3,4,7,8 in such a way that 7 is the first number and 8 is the last num
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!