Answer:
-2.5 is greater than -2.9 because on a number line -2.5 is closer to 0 that -2.9 is, and the more positive the number is, the greater it is
Step-by-step explanation:
Given:
Volume of cubical tank =
cubic meters.
To find:
The length of a side of the water tank.
Solution:
The volume of a cubical tank is:

Where, a is the side length.
It is given that the volume of cubical tank is
cubic meters. So,


Taking cube root on both sides, we get


Therefore, the length of a side of the water tank is 2 meters.
Solve for y in 3x+7=y
y=7−3x
Substitute y=7−3x
y=7−3x into 8x−3y=30
8x−3y=30.
17x−21=30
Solve for x
x in 17x−21=30
17x−21=30.
X=3
Substitute x=3 into y=7−3x
y=-2
Therefore,
x=3
y=−2