Answer:
$17.15
Step-by-step explanation:
15% reduction means 100-15 = 85% of the previous
85/100 × 2200
1870 kWh
he saves:
0.055(2000 - 1870) + 0.05(2200 - 2000)
7.15 + 10
$17.15
12y+3x-24 you times everything in the bracket by 3
U have to common factor that add up to -5 but times to 4 so basically the answer would be (x+5)(x-1)= 0 then you would get
x+5=0
x-1=0
both x’s are going to be different and have to equal to zero
x=-5
x=1
for the other one u just have to get two number that multiply to -49
x^2=-49
u square root the -49 and get -7 but u have to have both a positive and negative for 7
so
x=-7
x=7
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