HELP ASAP: Convert the quadratic equation y=−2(x+1)2−5 from vertex form to standard form

Hello people, i have a math question that i need with, me, i will give the correct one brainiest, and for the other correct people, a and 5 stars.

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Clarence wants to buy a new car. he finds an ad for a car that costs 27,200 dollars. suppose his local sales tax is 7%. -how much would he have to pay? -what is the cost of the car including tax? -if clarence has 29,864 saved, can he pay cash to buy the car?