Answer:
21 kWh
Step-by-step explanation:
1. Subtract 25% from the original amount.
25% of 28 kWh is ...
0.25 × 28 kWh = 7.00 kWh
Subtracting this from 28 kWh, we find the usage after reduction to be ...
28 kWh - 7 kWh = 21 kWh
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2. We know that if we reduce 100% of a quantity by 25%, then the resulting amount is (100 -25)% = 75% of the original. As a fraction, this is 75/100 = 3/4 of the original amount. Then the reduced usage is ...
(3/4) × (28 kWh) = 3·(7·4)/4 kWh = 3·7 kWh = 21 kWh
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Mario must reduce his usage to 21 kWh or less.
87 and 93
45 and 135
74 and 106
Answer:
3
Step-by-step explanation:
Same as: 8.5-5.5 = 3
Answer:
25
Step-by-step explanation:
b the shapes are rectangele and triangele
c triangle base times hieght divided by 2 rectangele leingth times width
d rectangle- 3*5= 15
triangle 4*5=20 20/2=10
10+15=25
