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3 years ago

Simplify each ratio. 1) 40:15

Mathematics

1 answer:

Vilka [71]3 years ago

3 0

Answer:

8:3

Step-by-step explanation:

,,,,lol hope it helps i don't know how to explain,,, I guess its just dividing you know like 15÷5= 3 so on

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What is the answer ? <br> 640 <br> 240<br> 300<br> and 320

patriot [66]

Step-by-step explanation:

10±10±30±30=80

8round = 80×8=640

<h2>don't forget me to follow</h2>

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3 years ago

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Alexeev081 [22]

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3 years ago

the Ratio of Chaperones to student on a field trip is 2:7 . There are 14 Chaperones on the field trip . In all , how many chaper

ozzi

Answer:

Step-by-step explanation:

If the 2 in the ratio translates to 14, 14/2=7. So the scale factor is 7. Now we multiply the 7*(Scale Factor)(7)= 49. In the end we add 14+49 to get 63.

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4 years ago

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Can someone please help me with number 19

kipiarov [429]

The expression of the problem is, 8x.
where "x" stands for the number of dogs. so you would then substitute x with 12. Then you would solve the problem to get your answer.(8•12)

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3 years ago

A DNA sequence can be represented as a string of the letters ACTG (short for adenine, cytosine, guanine, and thymine). How many

maria [59]

To solve that question we can think by the following way:

The first letter can be any of the letters (A, C, T or G). Therefore there are 4 possibilites.
To choose the second letter of the sequence, any letter also can be chose. So, one more time, there are 4 possibilites.

Using the fundamental principle of counting, we will find out that can be formed $4\times 4 = 16$ differents sequences (for example, AA, AG, TT, TG, CT...).

Know we know that, we can generalize. If I have $n$ elements and I must choose one of them $t$ times to do a sequence, the total number of sequence that I can form will be $n^t$ .

In our question, we want to know how many DNA sequence are exactly 29 letters long. As indicated above, the answer for that is $4\times 4\times 4\times ... \times 4$ (29 times) $= 4^{29}$ .

Therefore, there are $4^{29}$ DNA sequences with exactly 29 letters long.

I hope I've helped you. =D

Enjoy your studies. \o/

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3 years ago