What states that when you add zero to any number the sum is that number

A dolphin is swimming with her friend. The dolphin jumps to a height of 4.5 meters above the surface of the water as her friend swims 9.8 meters directly below her what is the position of the dolphins friend relative to the surface of the water?

What percent of 36 is 19.8

Standard notation 6x10/3

10.4, 10.3, 11.7, 11.1, 8.0, 4.4, 2.6, 1.8, 2.5, 4.4, 7.3, 9.5 Calculate the following for the data set: Mean: Median: Mode: Range:

A gardener is planting two types of trees: type A is 5 feet tall and grows at a rate of 18 inches per year. Type B is 8 feet tall and grows at a rate of 14 inches per year.

Order from greatest to least 4.1,4.01,4.009,4.085

Write in word form 7x10,000+5x10+4x1

What is the product of - 2 2/5 and - 3 5/6

Solve each system by substitution. (-3x + y = 20) (-5x - 7y = - 10)

What is 183 divided by 67?