Question

Which statement is correct about relations and functions?

All relations are functions.
All functions are relations.
No relations are functions.
No functions are relations.

Find the value of -7 + 3(-12) ÷ (-3).

-16
-19
-40
5

If f( n ) = n 2 - n , then f(-4) is _____.

-20
20
12
-12

Answer 1

1. all functions are relations.

2.
-7 + 3(-12) ÷ (-3)
-7 - 36 ÷ -3
-7 - (-12)
-7 + 12
5

3.
f(n) = n² - n f(-4)
f(-4) = -4² - (-4)
f(-4) = 16 - (-4)
f(-4) = 16 + 4
f(-4) = 20

hope this helped, God bless!