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Sati [7]
2 years ago
8

There are 9 red marbles and 5 blue marbles in a bag. What is the ratio of blue marbles to all marbles

Mathematics
1 answer:
LenKa [72]2 years ago
4 0

Answer:

9:5

Step-by-step explanation:

I think it's 9:5 sorry if I'm wrong.

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What is the sum of the first 14 terms of the sequence : an=6n-12
Gemiola [76]
A1=6*1-12=-6   arithmetic sequence 
a14=6*14-12=72
sum =n(a(1)+a(n))/2
sum =14*(-6+72)/2=462
5 0
3 years ago
At the first pep rally of the season, the football team and the volleyball team were presented to the student body. During the p
Darina [25.2K]

Answer:

A. f + y ≤ 11

17f + 287 ≤ 242

Step-by-step explanation:

[] Let <em>f</em> be football players and <em>v</em> be volleyball players.

-> The total time must be less than or equal to 242 seconds.

-> If football players talked for 17 seconds, we can write it as 17f.

-> If volleyball players talked for 28 seconds, we can write it as 28v.

[] Coming back to the first point I made, the total time must be less than or equal to 242 seconds.

-> 17f + 28v ≤ 242

[] This is going to be a part of our system of inequalities

-> Because of this, we rule out the following options.

B & D - the football players talk for 17 seconds, not the volleyball players

C ​ - not less than or equal too, only less than

[] This leaves us with the option of A.

-> The first part of it also works. If 11 players can talk to the crowd, then the total of f and v must be equal too or less than 11.

Have a nice day!

     I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.

- Heather

5 0
2 years ago
Will give brainliest or however its spelled THis will have to things you need to help me with!! I need help now because its due
alexdok [17]

Answer:

18

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Round your answer to the nearest tenth.<br> y = 2x + 7 y=2x-2
Jet001 [13]

Answer:

no solution

Step-by-step explanation:

when you put in what y equals you get 2x-2=2x+7

8 0
3 years ago
A photographer is 6 feet tall and cast a shadow that is 2 feet long. He is photographing a palm tree with a shadow that is 7 fee
Novay_Z [31]

Answer: The height of the tree is 21 feet.

Step-by-step explanation:

Here we can assume that the angle at which the sun impacts the photographer and the tree to be the same angle.

Then we can think in both cases as triangles rectangles, where the height is a cathetus, and the shadow is the other cathetus.

Then we will have a relationship like:

Tg(angle) = shadow/height

height = shadow/Tg(angle)

Now, because for both triangles we have the same angle, then Tg(angle) will be the same number for both cases, and we can just think of it as constant K

Tg(angle) = K

Then we have the equation:

Height = Shadow/K

We know that the photographer is 6ft tall, and his shadow is 2 ft long, we can replace those two things in the above equation and find the value of k:

6ft = 2ft/K

K = 2ft/6ft = (1/3)

Now we know that the shadow of the tree is 7ft long, then the height will be:

height = 7ft/(1/3) = 7ft*3 = 21ft

The tree is 21 ft tall.

6 0
3 years ago
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