Answer:
Step-by-step explanation:
Given
--- volume
Required
The surface area as a function of base length
The volume (V) is calculated as:
Make y the subject
Substitute 3 for V
The surface area of the open box is:
Substitute:
Hence, the function is:
Answer:
B.
C.
D.
E.
Step-by-step explanation:
Answer:
A book is worth $1 and a DVD is worth $12.
Step-by-step explanation:
The equations (2 unknowns and two equations, d is for a DVD and b is for a book):
For David: 3d+4b=40
For Anna: d+6b=18
Now multiply the second equation with -3 and add to the first equation:
3d+4b=40
−3d−18b=−54
Combined equation: −14b=−14 and b=1 (means that each book is worth $1).
Now for DVD price, use the second equation:
d=18−6 or d=12 (means that each DVD is worth $12).
A book is worth $1 and a DVD is worth $12.
2 x (5-2)^3
2 x (3)^3
2 x 27
54
