Math Problem Statement
the eleventh term of an arithmetic sequence is 30 and the sum of the first eleven terms is 55. what is the common difference?
Solution
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Math Problem Analysis
Mathematical Concepts
Arithmetic Sequences
Linear Equations
Systems of Equations
Formulas
n-th term formula: T_n = a + (n-1)d
Sum of the first n terms: S_n = (n/2) × (2a + (n-1)d)
Theorems
None (Basic properties of arithmetic sequences and linear systems)
Suitable Grade Level
Grades 9-10
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