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.

Trig. Ratios of perimeters and areas. The areas of two similar polygons are in the ratio 64:81. Find the ratio of the corresponding sides.

Tell whether the sequence 1/3, 0, 1, - 2 ... is arithmetic, geometric, or neither. Find the next three terms of the sequence. A. neither; 7, - 20, 61 B. geometric; 7, - 20, 61 C. arithmetic; - 1/3, 1 1/3, 3 D. geometric; - 3 1/3, - 5 5/9, - 9 7/27

You open your closet and see 3 pairs of pants, 9 shirts, 2 hats, and 2 pairs of shoes. how many outfits are possible?

What is the ratio equivalent to 5:9

Ina certain chemicl reaction, the ratio of zinc to copper is 4 to 19. A jar of the chemical contains 950 grams of copper. How many grams of zinc does it contain

How to find the quadrant of an angle over 360?

What is 3822 devided by 39

Which of the following expressions are equivalent to x - (-x) + y A. 0+y B. y C. None of the above

In the function y=5x-35, the output is - 25. Whats the input

An investor puts $900 in an account that pays 3% interest compounded annually. find the account balance after 5 years.