Add/Subtract integers

Is there a double sign?

$$-6-3$$

Is there a double sign?

$$-6-\left(-3\right)$$

$$3+\left(-8\right)$$

$$-9-\left(-3\right)\$$ becomes

$$-6-\left(-3\right)$$

(-10.3) + (-7.5)

$$-2\frac{1}{3}-\frac{1}{3}$$

$$8-\left(-3\right)+7$$

If $$x=-2\ and\ z=-10$$ and $$x>y>z$$ which number could y represent

Mount Everest is 29,028 feet above sea level. The bottom of the Mariana Trench is 36,070 feet below sea level. What is the difference between these two elevations?

The annual profits (in millions of dollars) of an online gaming company for the last five years are

-1.7, -4.75, 1.7, 0.8, and 3.2

What is the total profits for the company?

What is the distance between $$-\frac{1}{3}$$ and $$-2$$ on a number line