A "system" of equations is a set or collection of equations that you deal with all together at once. Linear equations (ones that graph as straight lines) are simpler than non-linear equations, and the simplest linear system is one with two equations and two variables.
B because of what is shown above.
Answer: Charges build up when negative electrons are transferred from one object to another. The object that gives up electrons becomes positively charged, and the object that accepts the electrons becomes negatively charged
Answer:
The Indus River Valley
Step-by-step explanation:
The Persian Empire spanned from Egypt in the west to Turkey in the north, and through Mesopotamia to the Indus River in the east.
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