Answer: 840000
Step-by-step explanation:
Here's the equation:
0 = 60 x gallons - 420
In order to get how many gallons you need to make 0$ in profit, you need to:
1) Divide 420<span>÷60
2) 420</span><span>÷60=7
3) Plug it in: 0 = 60 x 7 - 420
4) Does it work? Yes.
5) Therefore, the answer is 7.</span>
Answer:
2.25 lbs
Step-by-step explanation:
Answer:
13 l of 15%, 13 l of 25%, 26 l of 70%
Step-by-step explanation:
solutions:
final solution:
This includes 0.45*52l= 23.4 l acid
Let's assume:
- amount of 15% solution= x
- amount of 25% solution= y
- amount of 70% solution= z
- and we have z=2y
so there are 2 equation:
or
- x+y+2y= 52 ⇒ x+3y= 52 ⇒ x= 52- 3y
- 0.15x+1.65y=23.4
- 0.15*(52-3y)+1.65y=23.4
- 7.8-0.45y+1.65y=23.4
- 1.2y=23.4-7.8
- 1.2y= 15.6
--------
- x= 52- 3*13= 13 l
- z= 2y= 2*13= 26 l
