Area of the square bottom = L x W = 5 x 5 = 25 square cm
Area of triangle = 1/2 x base x height = 1/2 x 5 x 6 = 15 square cm
Total area = 25 + 15 = 40 square cm.
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
The awnser to number 2 i think
2. area = 363,636
Answer:
answer is 13
Step-by-step explanation:
13+38=51
4*13-1=51
