Answer:
a)
Step-by-step explanation:
To find inverse:
replace f(x) with y: y = 2(x + 4)
Then switch y and x: x = 2(y + 4)
Finally make y the subject:
x = 2(y + 4)
x/2 = y + 4 (divide by 2)
x/2 - 4 = y (subtract 4)
So, the inverse is y = x/2 - 4
Answer:
12(2v-7)
Step-by-step explanation:
Answer:
7<x<31
Step-by-step explanation:
The third side of any triangle must be more than the difference between the other two sides.
x>19-12
x>7 (or) 7<x
The third side of any triangle must be less than the sum of the other two sides.
x<19+12
x<31 (or) 31>x
Put them together.
7<x<31 (or) 31>x>7
Just sub x in with 5.
So 6(5)^3+8(5) = 6 (125) + 40 = 750 + 40 = 790.
So 790
