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marusya05 [52]
3 years ago
10

Use only the digits 0 - 9 and the decimal and the negative sign, if needed, to fill in the blank.

Mathematics
2 answers:
FromTheMoon [43]3 years ago
7 0

Answer:

7

Step-by-step explanation:

f(x) = 2x + 9

For f(-1), replace x by -1

f(-1) = 2(-1) + 9

= -2 + 9

= 7

saul85 [17]3 years ago
4 0

Answer:

see below

Step-by-step explanation:

f(x) = 2x + 9,

Let x = -1

f(-1) = 2(-1) +9

      = -2 +9

      = 7

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