N(2n+6)-(n²-1)= 2n²+6n-n²+1=n²+6n+1
Answer: a
Infinitely many
Step-by-step explanation:
Solve by substitution:
1) Solve 
for 
:
2) Substitute 
for in 
:
3) Simplify both sides of the equation:
4) Add -2 to both sides of the equation:
5) Simplify both sides of the equation:
Therefore, there are infinitely many solutions.
Solve by elimination:
You cannot solve this system by elimination
Solve by graphing:
The 
equations are on top of each other, therefore, the system of equations has infinitely many solutions.
Answer:
224 printers
Step-by-step explanation:
56computers×4printers per computer=224 printers
Answer:
4^6
Step-by-step explanation:
Answer: 7 gallons; 14 gallons
Step-by-step explanation:
Let the amount of water in the first container be x.
Since one container holds 2 times as much as the other, the second container will be: = x × 2 = 2x
The total amount of water is 21 gallons. This means:
x + 2x = 21
3x = 21
x = 7 gallons
First container = 7 gallons
Second container= 2x = 2×7 = 14 gallons
