(+3x+4y=2)
(+4x-4y=12)
-----------------
7x = 14
-----------------
7
X=2
3(2)+4y=2
6+4y=2
4y=-4
Y=-1.
Or you can plug x into the other equation.
4(2)-4y=12
8-4y=12
-4y=4
Y=-1.
Answer:
Population after 
Step-by-step explanation:
If
is the initial amount,
is the annual rate of decrease then after
years the remaining amount
will be given by

Here 
C, 450 cubics yds because 20 x 5 x 9 equals 900. 900 divided by two (half) is 450
Answer:
1.75
Step-by-step explanation
from the 5 you taking away 3 1/4 which when doing that it gives you the total of 1.75