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ziro4ka [17]
3 years ago
7

The mean of a data set of 3 numbers is 12. The mean of a data set of 9 numbers is 40. What is the mean of the combined data sets

?

Mathematics
2 answers:
Aleksandr-060686 [28]3 years ago
6 0

<em>Hope</em><em> </em><em>t</em><em>h</em><em>i</em><em>s</em><em> </em><em>will</em><em> </em><em>help</em><em> </em><em>u</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>

laiz [17]3 years ago
5 0

Answer:

33.

Step-by-step explanation:

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Someone please help!
Vlad1618 [11]
Multiply the top equation by 6 and the bottom equation by 7. You will cancel x first by doing this and solve for y. You should get y=-1.
Substitute in y for either original equation.
You should get x=1.
Solution is (1,-1).
7 0
3 years ago
If the slope of a line is 2 and it's y-intercept is 5, what is the equation of the line? A.x=2y+5 B. Y=5x+2 C. Y=2x+5 D. X=5y+2
Genrish500 [490]
Y= 2x+5
According to the slope int. formula,
y=mx+b
here, slope, m=2
y int, b =5
so, the equation is y=2x+5
4 0
4 years ago
Read 2 more answers
Factor the expression by finding the GCF. 16m2 − 12m
ziro4ka [17]

Answer:

4m(4m-3)

Step-by-step explanation:

16m^2 − 12m

16 m^2 = 2*2*2*2*m*m

12m = 2*2*3*m

The greatest factor for 16m^2 and 12m is 2*2*m  or 4m

Factor out 4m

16 m^2 = 2*2*2*2*m*m = 4m(2*2m)=4m(4m)

12m = 2*2*3*m = 4m(3)

Factoring out 4m

16m^2 − 12m

4m(4m-3)

3 0
3 years ago
Read 2 more answers
PLEASE HURRY
faust18 [17]

Step-by-step explanation:

width= w

length = l=w+5

Area = l * w

104 =(w+5) * w

w2 +5w -104 =0

(w+13)(w-8)=0

w=13 and w=8

so width =8

length=13

3 0
3 years ago
PLEASE HELP!! ill give you 20 points ​
const2013 [10]

Step-by-step explanation:

7 0
3 years ago
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