Can someone please help me I need to know Simplify, write each expression using only positive exponents.
1. 8x^-3
2. 5^-3 ∙ m ^6
3. 7p^5 / p^-1
*The slash on the third question means its a fraction, and this ^ means to the power of.

7x+8y=-18, 4x-9y=-3 solve the system of equations

The highest point on earth is the peak of mount everest if you climb to the top you would be approximately 29,035 feet above sea level at remembering that amount is 5280 feet percentage of the height of the mountain would you have to climb to reach a point 2 miles above sea level

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex