Answer:
its 90% if you work it out
Step-by-step explanation:
I hope this is the answer
Write an expression for the amount she added:
Dimes: 2(0.10)
Quarters: 3(0.25)
Nickels: 6(0.05)
Now write an expression for what she took out:
Quarters: 2(0.25)
Dimes: 5(0.10)
Now combine them:
2(0.10) + 3(0.25) + 6(0.05) - 2(0.25) - 5(0.10)
Simplify:
0.20 + 0.75 + 0.30 - 0.50 - 0.50
1.25 - 1.00 = 0.25 increase.
Answer:
Step-by-step explanation:
x^2 - 22x = 10
Next step is to complete the square on the left hand side of the equation and it would be balanced by adding the same number to the right side of the equation. It becomes
x^2 - 22x + (22/2)^2 = 10 + (22/2)^2
x^2 - 22x + (11)^2 = 10 + (11)^2
x^2 - 22x + (11)^2 = 10 + 121
x^2 - 22x + (11)^2 = 131
x^2 - 22x + 121^2 = 131
(x - 11)^2 = 131
Taking square root of both the left hand side and the right hand side of the equation, it becomes
x - 11 = ±√131
x - 11 = ±11.45
Adding 11 to the left hand side and the right hand side of the equation, it becomes
x - 11 + 11 = ±11.45 + 11
x = 11.45 + 11 or x = -11.45 + 11
x = 22.45 or x = - 0.45