Find the error and explain why it is wrong. Jon found the solution to the system of linear and quadratic equations. what did he do wrong?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels

Asap will give brainiest to first person to answer what is the measure of angle b in the triangle? enter your answer in the box.m∠b=

In the next 10 month,colin wants to save $900 for his vacation.he plans to save $75 each of the first 8 months. how much must he save each of the last 2 months in order to meet his goal if he saves the same amount each month ?