Answer:
23) x= 3, y = 4
24) Any (x,y) values where x = 1.5 - 2y
Step-by-step explanation:
For the first system(23), it goes like this
[1 2 | 7]
[2 1 | 8]
We need to do L2 = L2 - 2L1, so now it is
[1 2 | 7]
[0 -3 |-6]
So, now we have:
-3y = -6 *(-1)
3y = 6
y = 2
x + 2y = 7
x + 4 = 7
x = 3
Now for system 24, we have:
[-1 2 | 1.5]
[2 -4| 3]
We do L2 = L2 + 2L1, so we have:
[-1 2 | 1.5]
[0 0| 0]
So there are infinite solutions for this system. The solution for this system will be each (x,y) pair where x = 1.5 - 2y.
The area of the circle would be 0.97
First, the item goes on sale for 25% discount which means that the price will now be only 75% of the original price.
Case 1: Price = ($80)(0.75) = $60
Then, the item is sold for additional discount of 10% which the new price is only 90% of the supposed price.
Case 2: Price = ($60)(0.90) = $54
Answer: $54
Answer:
2
Step-by-step explanation:
