Answer:
x = 4
Step-by-step explanation:
16 × 7 = 112
2^4 = 16
so that is the answer
Step-by-step explanation:
(2a+3b)(4a²-6ab+9b²
(2a+3b){(2a)²-2a×3b+(3b)²}
Because (a³+b³)=(a+b)(a²-ab+b²)
Therefore,
(2a+3b){(2a)²-2a×3b+(3b)²}
=(2a)³+(3b)³
By substituting the values , we get
- (2a)³+(3b)³
- (2×3)³+(3×(-5))³
- 6³+(-15)³
- 216+(-3375)
- 216-3375
- -3159
X+2 =0
x= -2
subs x= -2 in the equation
(-2)^3 - k(-2)^2 +3(-2) +7k = 0
-8 - 4k - 6 +7k =0
3k = 14
k= 14/3
Answer:
3 kg of copper,
1.25 kg of nickel,
0.75 kg of zinc.
Step-by-step explanation:
i'm assuming you copied the question wrong and that the right metals are, copper, nickel* and zinc.
here's an explanation~
copper ; 12 x 1/4 = 3 kg
nickel ; 5 x 1/4 = 1.25 kg
zinc ; 3 x 1/4 = 0.75 kg
i hope this was helpful! <3