You could better find the answer at
https://answers.yahoo.com/question/index?qid=20110628190101AAKUGSE
where someone else has already figured it out
Answer:
Step-by-step explanation:
(3x – 5)(–x + 4)
(3x)(–x) + (3x)(4) + (–5)(–x) + (–5)(4).
-3x^2+12x +5x -20
-3x^2+ 17x -20
<h2>22</h2>
In this problem, we need to use <u>multiplication</u> and <u>subtraction</u> method to solve it.
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x(y) means to <u>multiply</u> x with y
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Note that {a = 7} and {b = 6}
First, we need to multiply 4 with {a = 7}, we get:
4(7) = <em>28</em>
<em />
Then, we need to subtract {b = 6} from <em>28</em>, we get:
<em>28</em> – 6 = 22
Finally, this simplifies as:
4(7) – 6 = 22
<em>Hope this helps :)</em>
For number 10 the y-intercept is going to be at -1 1/3 not -1.
Answer:
mean age of women
(x+y+z)/3=27
mean age of men
(x1+x2+x3+x4+x5+x6)/6=34
mean age of all people in the office
x+y+z=27*3=81
x1+...x6=34*6=204
so
mean age( x+y+z+x1+x2+..x6)/(3+6)=(27*3+34*6)/9
=(81+204)/9=285/9=32 approximately
