A solution to a equation is when the variable is substituted fully. That makes the equation true.
See https://web2.0calc.com/questions/help-please_82538.
Answer:
Step-by-step explanation:
first term = a = 3
common ratio = 2nd term ÷ first term
= 12 ÷ 3
r = 4

Answer: C
Step-by-step explanation: l-7&!:
Answer:
14
Step-by-step explanation:
mass of 100 centimeters of copper wire is 
so, mass of 1 centimeter of copper wire will be 
hence, 14 centimeters of copper wire will provide .28 copper