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arsen [322]
3 years ago
15

Mean and median of 47,49,54,50,48,47,55​

Mathematics
1 answer:
elena55 [62]3 years ago
6 0

median- 49

mean- 50

Steps: find median order the numbers from least to greats the number in the middle is your median if there are two numbers in the middle you add the two numbers then divide by 2

find mean add all the numbers then divide by how many numbers there in this case you divide by 7

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The first term of a geometric series is 3, and the sum of the first term and the second term is 15. What is the sum of the first
8_murik_8 [283]
Hello,
u_{1}=3
u_{2}=3*r

u_{1}+u_{2}=15=3(1+r)
==> 1+r=5==>r=4

3+3r+3r²+3r^3+...+3r^6=3(1+r+r²+...+r^6)=3*(r^7-1)/(r-1)=4^7-1=16383









7 0
3 years ago
A random sample of 30 seventh grade students shows that 12 of them own a dog. How many seventh grade students can you predict ow
ArbitrLikvidat [17]

Answer:

160

Step-by-step explanation:

If out of 30 7th graders, 12 own a dog then when you have 400 of them, 160 will have a dog as well.

The way I did this was by 400/30: which was 13.3 repeating. I then mutliplied this number by 12, to find the final answer of 160.

4 0
3 years ago
Read 2 more answers
What is the ratio of the surface areas of the similar square pyramids below?
mamaluj [8]

Step-by-step explanation:

8 times 12 is 96

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5 0
2 years ago
9 Questions/45 points
Finger [1]
You have a lot of questions here, try breaking them up into multiple posts and you may get more responses.

I will help with some.

<span>(x+3)=0

The solution is just -3.
-----------------------------------------------------------------
3m(m-4)=0

The two solutions are 0 and 4.
-----------------------------------------------------------------
(r-3)(r+2)=0

The two solutions are and 3 and -2.
</span>
I hope this gets you started in the right direction.


3 0
3 years ago
A farmer can plant up to 6 acres of land with soybeans and corn. Her use of a necessary pesticide is limited by federal regulati
horrorfan [7]
The answer is x≥0 y≥0 x+y≤6 2x+3y≤15
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