Having trouble with subtracting Negative numbers.

I thought if you subtract 4 - (-8) it would be - 12 instead of (+) 12 can someone explain this to me in detail because I'm alittle confused on subtracting negative numbers.

Ron wants to buy a video game with a selling price of $48. It is on sale for 50% off. The sales tax in his state is 4.5%. How much is the discount?

Denver is the Mile-High City. How high is this in a feet

Vernon earns 558.25 a week. If he works 38.5 hours each week, how much does Vernon earn a hour

The top and bottom margins of a poster are 6 cm and the side margins are each 2 cm. If the area of printed material on the poster is fixed at 390 square centimeters, find the dimensions of the poster with the smallest area.

1 4/9 + 2 6/9 is equal to 4 1/9 True or False?

Is the following argument valid? State why or why not. Use a truth table. If I like chocolate or ice cream, then I like candy. I don't like ice cream. Therefore, I like candy or chocolate.

Hershel buys 5 bags of cookies, 3 bags of granola, and several bags of fruit snacks from a bake sale. In total, he buys 10 bags from the bake sale. How many bags of fruit snacks did Hershel buy?

Estimate the number 7.616 to show that the number 76.16 is not correct.

What is 506 times 36

A private club was reduced by five members each week for 45 weeks what was the total change in the club size