Answer:
4m^4 - 8/3m^2 n^2 + 4/9n^4
Step-by-step explanation:
(2m^2 - 2/3n^2)(2m^2 - 2/3n^2)
= 2m^2(2m^2 - 2/3n^2) - 2/3n^2(2m^2 - 2/3n^2)
= 4m^4 - 4/3m^2 n^2 - 4/3m^2n^2 + 4/9n^4
= 4m^4 - 8/3m^2 n^2 + 4/9n^4
Let the number be n.
Adding a zero means multiplying the number by 10, 10n.
143-10n=3n, 13n=143 so n=11.
Answer:
B.
Step-by-step explanation:
Answer:
D.$45.58
Step-by-step explanation:
The monthly charge for 300 kWh of electricity during the second period will be:
$6.08 + $0.13(250) + $0.14(50)
$6.08 + $32.5 + $7
= $45.58
The first 250 kWh of electricity used will be at the range of 0 - 250 and the remaining 50 kWh will be at the range of 251 - 360.