The number of solutions for each system of two linear equations.
Zero
Solutions
One
Solution
Infinitely
Many
Solutions
2x + 2y = 3
4x + 4y = 6
7x + 5y = 8
7x + 2y = 8
-2x + 3y = 7
2x - 3y = -7

system (1) ⇒ Infinitely Many Solutions

system (2) ⇒ One Solution ⇒ ( 8/7 , 0)

system (3) ⇒ Infinitely Many Solutions

Step-by-step explanation:

A) The first system of two linear equations.

2x + 2y = 3 ⇒(1)

4x + 4y = 6 ⇒(2)

If we multiply equation (1) by 2, we will get equation (2)

So, the system in fact represents one equation.

So, The system has Infinitely Many Solutions

B) The second system of two linear equations.

7x + 5y = 8 ⇒(1)

7x + 2y = 8 ⇒(2)

By subtract (1) - (2) we will get:

5y - 2y = 0

3y = 0

y = 0

Substitute at (1)

7x + 0 = 8

x=8/7

So, The system has only One Solution ⇒( 8/7 , 0)

C) The last system of two linear equations.

-2x + 3y = 7

2x - 3y = -7

If we multiply equation (1) by -1, we will get equation (2)

So, the system in fact represents one equation.

So, The system has Infinitely Many Solutions

company a

step-by-step explanation:

using the linear regression models , it is found that company a   pays about $14 more. but using the same regression (linear) company b pays about $10 more.

so company a pays more than b

answer:   (s+1)(s+4)

step-by-step explanation:

factor s2+5s+4

s2+5s+4

=(s+1)(s+4)