Answer: 17mm
Step-by-step explanation:

Answer:
Option C and Option D have exactly one solution.
Step-by-step explanation:
The equation will have exactly one solution when it completely solves and we get value of x.
Checking all choices
(Choice A)
-19x + 18 = -19x + 18
-19x+19x=18-18
0=0
(infinite solutions)
(Choice B)
-19x -18 = -19x + 18
-19x+19x=18+18
0≠36
(no solution)
(Choice C)
19x + 18 = -19x + 18
19x+19x=18-18
38x=0
x=0
(One solution)
(Choice D)
19x - 18 = -19x + 18
19x+19x=18+18
38x=36
x=36/38
x=18/19
(One solution)
So, Option C and Option D have exactly one solution.
Answer : There are 13 fish food bags are could fit in a box of size
.
Explanation :
Length of box =
ft
Length of fish food box =
ft
Number of fish food boxes could fit in a box = 
Number of fish food boxes could fit in a box 
Hence, there are 13 fish food bags are could fit in a box of size
.
Answer:
16777216 is the answer....