smarty4390 smarty4390
  • 13-02-2021
  • Mathematics
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1TomT1 1TomT1
  • 13-02-2021

Answer:

15.) -21f - 16

16.) 5s + 2t

Step-by-step explanation:

15.)

-12f - 16 - 9f (Distribute 4 through the parentheses)

-21f - 16 (Collect like-terms)

16.)

4s + 2t + s + s - s (Since two opposites add up to zero, remove them from the expression)

4s + 2t + s (Collect like terms)

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