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.
Answer:
Step-by-step explanation:
2q + 2p = 1 + 5q
-3q + 2p = 1
-3q = 1 - 2p
3q = 2p - 1
q = (2p -1)/3
Answer:
x = -80
Explanation
-40 divided by 1/2 is -80
Answer:
Look at the whole numbers and not the tenths hundreds and stuff. 1,2,3.25 and then fraction.
Step-by-step explanation:
Answer:
-6x^6 + 4x^4 - 3x^3 + 4x^2 + 12
Step-by-step explanation:
-6x^6 + 4x^4 - 5x^3 + 2x^3 + 4x^2 + 12
-6x^6 + 4x^4 - 3x^3 + 4x^2 + 12
