Answer:
Gabe needs 20 liters of the 40% solution.
He also needs 40 liters of the 70% solution.
Step-by-step explanation:
Equation:
acid + acid = acid
0.40x + 0.70(60-x) = 0.60*60
40x + 70*60 - 70x = 60*60
-30x = -10*60
x = 20 liters
Gabe needs 20 liters of the 40% solution.
He also needs 40 liters of the 70% solution.
33tweets*x=total number of tweets, where x=days spent tweeting.
Answer = 5(x+1)^2 -21
5 {x^2 + 2x } - 16
5 {(x+1)^2 -1 } - 16
5(x+1)^2 -5 - 16
5(x+1)^2 -21
