A chemist has a container of 12% peroxide solution and a container of 20% peroxide solution. She needs to mix the two solutions to create 100 ml of a 14% solution. If x represents the amount of 12% peroxide solution and y represents the amount of 20% peroxide solution she needs, which matrix equation can determine the amount of each solution she need to make the 14% solution?​

Since the total amount of the mixture is 100mL, thus, the sum of the amount of the 12% peroxide in the solution plu the sum of the 20% peroxide in the solution is 100mL.

Thus,

Also, since the resulting concentration of the mixture is 14% = 0.14.

Thus,

Therefore, the matrix equation that can be used to determine the amount of each solution needed is given by:

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: