Caleb placed $5,500 in three investments that pay an annual interest of 4%, 5% and 7%. He placed twice as much money in the 7% investment as he did in the 4% investment. His total interest for the year is $320. Using a 3×3 system, determine the amount of money Caleb placed in each of the three investments. Given x = the investment at 4%, y = the investment at 5%, and z = the investment at 7%, give the answer in the format (x, y, z) if there is a solution and `no solution` if it cannot be solved. (space between `,` and `#`)  

Subduction zones are found at _________ plate boundaries.

Graphically, a system of 2 variables in 2 equations with infinite solutions will appear as two lines that are the same.

A mineral property defined as the density of the mineral sample divided by the density ofwater (1.0 g/cm3) is

Biochemical limestones are dominated by carbonate mud and fragments of

What is the solution to the following system of equations? y=3x+6 −2x+4y=4 Write your answer in the format (#, #) if there is a solution and `no solution` if it cannot be solved. (space between `,` and `#`)

Why did the early Earth differentiate into core and mantle?

Grains of sediments and fossils in the deep ocean tend to be ___________-sized because of the low amount of energy in the environment.

Large layers of cross-bedded sand can be indicative of a ____________ environment.

The atomic number of an element corresponds to the __________