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melisa1 [442]
3 years ago
11

Explain how you would simplify the expression 3x + 7y - 2x + 3y + 7?

Mathematics
2 answers:
kipiarov [429]3 years ago
8 0

Answer:

Step-by-step explanation:

3x+7y-2x+3y+7

group like terms

3x-2x   +7y+3y   +7

x+10y+7

bulgar [2K]3 years ago
4 0

Answer:

grouping of line terms

3x+2x_7y+3y+7

Step-by-step explanation:

5x_10y+7

5x=10y

x=2y+7=9

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Systems of Linear Equations What are the different ways to solve a system of linear equations? When do you get an answer to a sy
Mrac [35]

Answer:

Different ways to solve a system of linear equations:

  • isolate one variable in one equation and replace it in the other equation
  • multiply/divide one equation by a constant and then add/subtract it to the other one, so that only one variable remains
  • graph the equation and look at the intersection point

If you graph the system:

  • there is only one solution if the lines intersects at only one point
  • there is no solution if the lines don't intersect each other (they are parallel)
  • there are infinitely many solutions if the lines overlap each other (they are the same equation multiplied by some constant)

Step-by-step explanation:

1st system

y = -x – 7  

y = 4/3 x – 7  

solution: x= 0, y = 7

2nd system

y = -3x – 5  

y = x + 3  

solution: x = -2, y = 1

3rd system

y = -2x + 5  

y = 1/3 x – 2

solution:  x = 3, y = -1

4th system

3x + 2y = 2  

x + 2y = -2  

solution: x = 2, y = -2

5th system

x + 3y = -9  

2x – y = -4

solution:  x = -3, y = -2

6th system

x – 2y = 2

-x + 4y = -8

solution:  x = -4, y = -3

7th system

5x + y = -2  

x + y = 2

solution: x = -1, y = -3

3 0
3 years ago
Read 2 more answers
Of the 22 students in the class, 16 of them are boys.
Eddi Din [679]
22 students...16 boys

probability student will be a boy is 16/22 which reduces to 8/11 or 72.7%
6 0
3 years ago
PLEASE HELP AND SHOW WORK I RLLY NEED TO PASS
Alex787 [66]

40×4×4=640

b=20 h=4

using formula:

1/2×base×height

1/2×20×4=40

its says scale by factor 4:

b=80 h=16

using formula:

1/2×base×height

1/2×80×16=640

answer------>>>>640cm^2

8 0
3 years ago
WHAT ARE THESE TWO ILL GIVE BRAINLESS AND SHOW UR WORK
belka [17]
N= 66°
k= 29°

All triangles add up to 180 so that’s how i got those
4 0
3 years ago
The common difference ,d in an arithmetic sequence whose fourth term is 16 and whose seventh therm is 31
Natali [406]

Answer: d=5

Step-by-step explanation:

Arithmetic progression

An=a1+d(n-1)

An= nth term

A1= first term

D= common difference

N= nth position

We are given the 4th and 7th terms

For 4th term,n=4

A4=a1+d(4-1)

A4= 16

16= a1+d(4-1)

16= a1+3d........equation 1

For the 7th term,n=7

A7=a1+d(7-1)

A7= 31

31=a1+6d......equation 2

Bring them together

16=a1+3d

31=a1+6d

Subtract equation 1 from 2

So we have

15=3d

D=15/3

D=5

Therefore, the common difference is 5

3 0
3 years ago
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