Answer:
12.56x^2+452.16
Step-by-step explanation:
A=pie r^2
(4x-24)/2= 2x-12 which is your radius
(2x-12)^2=4x^2+144
Pie=3.14ish
3.14(4x^2+144)
12.56x^2+452.16
<span>The electricity bill of Sarah’s house for the last month was $60, while for this month it is $120. If p is the percent increase in the amount, which proportion can be used to calculate p
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p/100 = (120-60)/60
p/100 = 1
p = 100%</span>
Answer:
180000
Step-by-step explanation:
4.5 x 5 = 22.5
22.5 x 8000 = 180000
Answer:
x = 7
y = 11
z = 14
Step-by-step explanation:
x + y + z = 32
Let's say the youngest is x, middle is y and oldest is z.
y= x+4 (age of the youngest + 4)
z= 2x (twice as old)
We can replace y and z in the main equation above with these values that contain x.
x + (x + 4) + 2x = 32
4x = 28, divide both sides by 4
x = 7
y = x + 4 = 7 + 4 = 11
z = 2x = 2*7 = 14
And to check: 7 + 11 + 14 = 32
120+4=124 cause if 20 +4=24 is just the same thing they just added a 1at the beginning
