C^2-a^2=b^2 b^2=81-36=45 x^2/36-y^2/45=1?
Answer:
The second one
Step-by-step explanation:
B c A
Because B has c and a, which is part of A (A={a, b, c})
Answer:
Step-by-step explanation:
sorry do not .know
Let x = liters 20% solution to be added
then
.12(12) + .20x = .14(12+x)
.12(12) + .20x = .14(12+x)
1.44 + .20x = 1.68 + .14x
.20x = .24 + .14x
.06x = .24
x = 4 liters
Hope this helped!!