Answer:
A and E
Step-by-step explanation:
x² = 81
~Take the square root of both sides
x = ±9
Best of Luck!
The ratio would be 3:4, or however you write ratios.
Hope this helped! :)
Answer:
The cost of 27 units of electricity will be Rs. 131.10
Step-by-step explanation:
Given that:
Cost of first 20 units = Rs. 80
Cost of per unit after 20 units = Rs. 7.30
Units consumed in a household = 27 units
Bill of first 20 will be Rs. 80 and 7 units will be charged on the rate of 7.30
Cost of 7 units = 7*7.30 = Rs. 51.10
Cost of 27 units = Rs. 80 + 51.10 = Rs. 131.10
Hence,
The cost of 27 units of electricity will be Rs. 131.10