goose egg - It doesn't mean "failure" so much as "no score" or "no results".
An algebraic expression contains one or more letters that stand for [numeric] variables.
Carbon- sixth element, contains six letters. Mars- fourth planet, contains four letters. Four- fourth number, contains four letters. Seven- seventh number, contains seven letters. September- ninth month, contains nine letters. Saturn- sixth planet, contains six letters. Fifth- fifth number, contains five letters.
There is no planet whose name contains 9 letters
letters
Fiasco.
An expression is a collection of numbers and letters for example: 2a this is expression 2a+5b this is also expression.
"Evaluate the expression" means replace all the letters with their numericalvalues, and then see what number the whole expression works out to be.
represent the letters with numbers
The variables in such expressions are letters, or some other special symbol (for example, Greek letters, or a combination of letters) - in this case, it's "t".
"the alp" contains 6 letters.
Gujarati contains 26 letters