Answer:
b
Step-by-step explanation:
Solution: x=4
Step by step solution:
Since it’s a scale copy the equation is 6/7.5=x/5
6/7.5=0.8
5*0.8=4
x=4
Hope that helps:)
Given that amount of first acid solution = 4 liters
Let concentration of the first acid solution = x
then effective amount of first solution = 4x
Given that amount of second acid solution = 10 liters
Givn that concentration of the second acid solution = 40% = 0.4
then effective amount of second solution = 0.4(10)
Then amount of resulting acid solution = (4+10) liters
Givn that concentration of the resulting acid solution = 30% = 0.3
then effective amount of resulting solution = 0.3(4+10)
Combining all those results gives equation
4x +0.4(10) = 0.3(4+10)
4x +4 = 0.3(14)
4x +4 = 4.2
4x = 0.2
x=0.05
Hence final answer is 0.05 or you can say 5%.
Answer:
X<4
Step-by-step explanation:
X/2<2 by subtracting 8 from both sides
Then you need to multiple by 2 and get
X<4
