Mathematics
EmpressNessy
30

If the first term in an arithmetic sequence is 15 and the tenth term is 69. What is the fourth term in the sequence?

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natedog4

Hello, [latex] a_{0}=15 [/latex] first term [latex] a_{1}=15+r [/latex] second term [latex] a_{2}=15+2r [/latex]  third term ... [latex] a_{9}=15+9r [/latex] is the tenth term =69 15+9r=69 ==>9r=69-15 ==>r=54/9=6 [latex] a_{3}=15+3r=15+18=33 [/latex]

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