Use the law of cosines to find a:

So to use the given numbers you get:

Which would come out to equal about 35.94
so a=35.9
120 - 4 - 6 = ( that is the process, you ca find the answer)
Answer:
Step-by-step explanation:
1. Sinking Fund: Expenses like these are predictable. You know exactly when they’re going to come due, and you know at least approximately how much they’re going to cost"
So we have: down payment for a car, saving to start a business, saving for a college education
2. Rainy-Day Fund: unexpected expense you have to pay,
So we have: plumbing expenses, paying to fix a broken air conditioner, unexpected travel expense, plumbing expenses
K=-9 Bc you move the variable to the left and then collect like terms and divide both sides