Answer:
Step-by-step explanation:
Given
Required
The maximum and minimum of z
To do this, we make use of the graphical method
See attachment for graphs of
The corner points of the function are:
We have:
Calculate z with the above values
So, we have:
Simple,
120 divide it by 3 to get your length.
Thus, it covers 140 ft of the wall.
Answer:
- C. y = x + 4, 2y = 2x + 8
Step-by-step explanation:
The system has infinitely many solutions if the two equations are equivalent.
<u>We can analyze the given systems to see:</u>
A)
- 2x + 7x + y = 6 ⇒ 9x + y = 6 ⇒ y = - 9x + 6
- y = 9x + 6
Different slopes, there is one solution
B)
Different slopes, there is one solution
C)
- y = x + 4
- 2y = 2x + 8 ⇒ y = x + 4
Same lines, infinitely many solutions
D)
- 7x - y = 10 ⇒ y = 7x - 10
- y = 6x + 8
Different slopes, there is one solution