An expression is defined as a set of numbers, variables, and mathematical operations. The given expression 7t · s · 3rt, when simplified will be equal to 21rst². The correct option is C.
What is an Expression?
In mathematics, an expression is defined as a set of numbers, variables, and mathematical operations formed according to rules dependent on the context.
The given expression 7t · s · 3rt can be written as,
7t · s · 3rt
= 7 × t × s × 3 × r × t
= 21rst²
Hence, the given expression 7t · s · 3rt, when simplified will be equal to 21rst².
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