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anastassius [24]
3 years ago
13

Pls help. No files pls. Will give brainliest.

Mathematics
1 answer:
nordsb [41]3 years ago
6 0

To find f(-20), first figure out which piece x = -20 fits with.

Since -20 < -12, x = -20 first in the domain used by the third piece.

For f(-20), treat this function as if it was just f(x) = 3x-7.

f(-20) = 3(-20) -7

         = -60 - 7

         = -67

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