About what percent is oxygen than silicon on the earths crust

Find the Dot Product if u=8i-7j and v=3i-4j?

30v^2 w^4 / 25v^5w^3 simplify

3918 divide 92 long divided

What does 9-2x-18x+14y-10 simplify to?

The difference between two positive integers is 50 and the ratio of these integers is 1:3. Find these integers.

A ball is dropped from a height of 100 inches the ball bounces, each time reaching a lower and lower height.

A dress just went on sale and is 20% Off. To return to its previous price, How much in percentage should the price be raised?

Find the perimeter of a rectangle that is 7 cm long is 7 cm wide

At the metal-casting company where i work, i must set up a conveyor system to move castings from the furnace to the heat treatment area 55 yards away. the castings cool at the rate of 0.

My rectangular soccer field site has a length equal to twice its width. Find its area in terms of its length x