Ni : Zn: Cu = 7:2:9 =7x : 2x : 9x
7x+2x+9x = 3.8
18x=3.8
x=3.8/18=1.9/9≈0.21
Ni: 7x=7*0.21=1.47 ≈1.5 kg
Zn: 2x=2*0.21=0.42≈0.4 kg
Cu: 9x=9*0.21=1.89 ≈1.9 kg
Check 1.5+0.4+1.9 =3.8 True
<span>For you: Area = 150 and height = 20
Plugging those into the formula, you get
Multiply .5 and 20:
To get base by itself, divide by 10 on both sides:
The base is 15 cm.</span>
-6 and -6 because -6 + -6 = -12 , you could also have -8 and -4 because -8 + -4 = -12, or you could also have -10 and -2 because -10 + -2 = -12
In a direct proportion, the equation can be set up as
y = kx
k = y/x
k = 6/20
k = 0.3
4 units wide
Any more help feel free to ask
