Answer: C or
41*67/2=1373.5
Step-by-step explanation:
Hi
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
Y=7............................................................................................................................................................
Answer:
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Step-by-step explanation:
Answer:
Each spend $12.71, Total spend $50.84
Step-by-step explanation:
42.38/4=10.595
10.595(.2)=2.119
10.595+2.119=12.714
round to 12.71 because there are no thousandths in money.
12.71(4)=50.84
