Acup of brewed tea has 54 milligrams less caffeine than a cup of brewed coffee. if a cup of tea has 66 milligrams of caffeine, how much caffeine is in a cup of coffee? write this problem in an equation.

There is 120 milligrams of caffeine in a cup of coffee.

Step-by-step explanation:

A cup of brewed tea has 54 milligrams less caffeine than a cup of brewed coffee. A cup of tea has 66 milligrams of caffeine.

Let the amount of caffeine in a cup of coffee be = x

In the equation form, we can denote this as:

Solving for x

x = 120

Therefore, there is 120 milligrams of caffeine in a cup of coffee.

x² + 11x + 18 < 0  

[-11 ± sqrt(121 - 72)]/2 = (-11 ± 7)/2  

solution: (-9, -2)

step-by-step explanation: