D
given the 2 equations
x + 2y = - 8 → (1)
- 4x + y = 5 → (2)
multiply (1) by 4
4x + 8y = - 32 → (3)
add (2) and (3) term by term to eliminate term in x
9y = - 27 ( divide both sides by 9 )
y = - 3
substitute y = - 3 in either (1) or (2) and solve for x
(1) : x - 6 = - 8 ( add 6 to both sides )
x = - 2
solution is (- 2, - 3 ) → D
Answer: $27.65
Step-by-step explanation:
0.18 = 6.3
Discount = $6.3
0.03 = 1.05
Tax = 1.05
35 - 6.3 - 1.05 = 27.65
Answer:
C
Step-by-step explanation:
Let's see if this makes sense and applies to all of the pairs.
1. y will be 2
x will be 6
2=1/3(6)
1/3 times 6 is 2.
2. y will be 1
x will be 3
1=1/3(3)
1/3 times 3 is 1.
3. y will be 0
x will be 0
0=1/3(0)
1/3 times 0 is 0.
4. y will be -1
x will be -3
-1=1/3(-3)
1/3 times -3 is -1.
They all apply to C meaning that C is the right answer.
Answer: 880. Divide .45 from 396 to get 880.
