MaeganL684275 MaeganL684275
  • 03-11-2022
  • Mathematics
contestada

simplify the expression 10 a -7 + 9 a . then evaluate the expression if a = 2

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LonnaK221840 LonnaK221840
  • 03-11-2022

We have the expression:

[tex]10a-7+9a[/tex]

We can simplify it by grouping the similar terms 10a and 9a:

[tex]\begin{gathered} 10a-7+9a \\ 10a+9a-7 \\ (10+9)a-7 \\ 19a-7 \end{gathered}[/tex]

When a=2, we can replace a with the value 2 and calculate:

[tex]\begin{gathered} 19a-7 \\ 19(2)-7 \\ 38-7 \\ 31 \end{gathered}[/tex]

Answer: The simplified expression is 19a-7.

The result of the expression when a=2 is 31.

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