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:
22.2
Step-by-step explanation:
Answer:
3; 4; 6; 1
Step-by-step explanation:
The base is 13 in each of the product factors, so the exponent of the product is the sum of the exponents of the factors:
- -11 +16 -3 +4 -5 = 1 . . . . matches option 3
- -21 -4 -5 +14 -6 = -22 . . . . matches option 4
- 33 -2 +5 -13 -8 = 15 . . . . matches option 6
- 0 +10 -12 +5 +4 = 7 . . . . matches option 1
The correct answer has to be A 42
