What is the definition for trench?

formed by sediment from plant and animal remains

long, but narrow, topographical depression

narrow strip of land connecting two landmasses

group of islands

The altitude of a plane as it begins to descend is shown by the linear equation a = 30,000 - 1500m, where a is the plane's altitude, in feet, and m is minutes. What is the plane's altitude when m = 12?

Solve the system using substitution. y = - 6x+54 5y-x+9=0

Write 7/10 as a sum of fraction two different ways

Is 100 students for every 2 buses unit rate?

Three times a number minus 9 is equal to two times the number plus 7

Tabitha's hiking distance in july was 2/5 miles she wrote the distance of 2.02 miles what error did she make?

Solve Y/5.6 = 12 for y

How to reduce 3/63 to its simplest form

Find the next three term sequence 2,8,32,128

Given that x and y are real numbers, find the value of x and y if (x+y) + (x-y) i=7+3i