Answer:
-3 -2
-2 0
-1 6
3 10
4 12
Step-by-step explanation:
f(x)=2x+4
Let x = -3 f(-3) = 2*-3 +4 = -6+4 = -2
Let x = -2 f(-2) = 2*-2 +4 = -4+4 = 0
Let x = -1 f(1) = 2*1 +4 = 1+4 = 6
Let x = 3 f(3) = 2*3 +4 = 6+4 = 10
Let x = 4 f(4) = 2*4 +4 = 8+4 = 12
What we know about this situation that either she will take less than 37 minutes:
r<37
or she will take more than 42 minutes
r>42
so it means that she cannot take between 37 and 42 minutes.
The best way to write it is:
37>r v r>42
where "v" means "or" in mathematical notation
8 - 7a = - 6a + 9
a = - 1
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