Multiply for the area, add for the perimeter.
F to C: Deduct 32, then multiply by 5, then divide by 9 C to F: Multiply by 9, then divide by 5, then add 32
-17
9
1-9
The two numbers that add to get -2 and multiply to get 9 are -3 and -3. When you add -3 and -3, you get -6, and when you multiply them, you get 9. This is because -3 + -3 = -6 and -3 * -3 = 9.
9 and 6 but subtract not add
The numbers are 10 and -9
16.5
21
-1
The two numbers are 1 and -9