Answer:
Step-by-step explanation:
Let the original electricity units used without energy savings be 100 units.
After the first energy saving improvement, the energy used
is 100 U - 25% of 100 U = 75U
After the second energy saving improvement, the energy used is
75U - 55% of 75 U = 33.75 U
After the third energy saving improvement, the energy used is
33.75 U - 20% of 33.75 U = 27U
Therefore, the overall percentage saving is 100U - 27U = 73U or 73%
To find the x-intercept you must make y=0
3x+2y=12 - substitute 0 for y
3x+2(0)=12 - multiply 2 and 0
3x+0=12 - add zero
3x=12 - divide by 3
x=4
To find the y-intercept you must make x=0
3x+2y=12 - substitute 0 for x
3(0)+2y=12 - multiply 3 and 0
0+2y=12 - add 0 and 2y
2y=12 - divide by 2
y=6