## On a math test a student, Sarah, has to identify all the coefficients and constants of the expression 9 b + 4 + y. Sarah says that 9 is a

Question

On a math test a student, Sarah, has to identify all the coefficients and constants of the expression 9 b + 4 + y. Sarah says that 9 is a coefficient and 4 is a constant. Identify all the coefficients and constants of the expression. What error might Sarah have made?

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Math
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2021-10-13T08:04:31+00:00
2021-10-13T08:04:31+00:00 1 Answer
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## Answers ( )

Step-by-step explanation:4 + n + 7m

constants are just the numbers with no variables (letters)

so the constant is 4

coefficients are numbers multiplied by variables (letters)

so the coefficients are : 7 and 1

the error sarah made is forgetting the coefficient of n……because even if it is not written, n is the same as 1n….so basically, there is a coefficient for EVERY variable, even if its not written.