Answer:
Slope: 3/5
y-intercept: 7
Step-by-step explanation:
- a number
- its square
- the sum
- less than or equal
negative three - I don't have to explain this one, do I?
- the sum of a number and its square is less than or equal negative three
I cant see anything there needs to be more to the question
1. Divide both sides by 2
2. Add 16 to each side
Answer x > -2
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
