Answer:
~15.55 is the mean.
Step-by-step explanation:
The class of frequency is given as 0-9, 10-19 and 20-29.
First of all, let us taken middle value of class:
Formula for mean:
where f is the frequency
and m is the mean value calculated in above step (4.5, 14.5 and 24.5)
The frequencies are given as:
4.5 - 24
14.5 - 20
24.5 - 32
Putting the values in above formula:
Please refer to the attached image that contains the table for calculation of mean.
So, mean = ~15.55
Hello,
(x-1)(x-2)(x+3)²=(x²-3x+2)(x²+6x+9)
=x^4+3x^3-7x²-15x+18
Answer A
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Janet invested $6000 at 2 %.
Let <em>x</em> = amount invested at 2 %. Then 10 000 - <em>x</em> = amount invested at 12 %
interest at 2 % + interest at 12 % = 600
0.02<em>x</em> + 0.12(10 000 –<em> x</em>) = 600
0.02<em>x</em> + 1200 – 0.12<em>x</em> = 600
0.10<em>x</em> = 600
x = 600/0.10 = 6000
