Will the sum of 56+ (-56) be Positive negative or zero

What is (28 + 7 + 6 + 3) x 1/2 show your work

Mr. and mrs. wallace have decided to buy a car for $21,600. they finance $15,000 of it with a 5-year auto loan at 2.9% arp. what will be their monthly payment be? a. $268.20 b. $268.86 c. $269.54 d. $387.16 (monthly car loan payment per $1,000 borrowed) i need !

Three times the sum of a number and seven is negative thirty-six. what is the number?