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wolverine [178]
3 years ago
7

PLS HELP ME ON THIS QUESTION I WILL MARK YOU AS BRAINLIEST IF YOU KNOW THE ANSWER PLS GIVE ME A STEP BY STEP EXPLANATION!!

Mathematics
1 answer:
Basile [38]3 years ago
7 0

Answer:

either it's 1:3 or 1:6

Step-by-step explanation:

3 students went to the zoo, and 15 students went to the aquarium.

15 plus 3 is 18.

3/18 then reduces to 1/6

therefore it is:

1:6

(before, I got my answer deleted so, maybe it is 1:3, but I solved it and got 1:6)

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The probability of guessing correctly on 5 true- false questions is (3)". Express this probability as a fraction without exponen
Free_Kalibri [48]

3/5

Just do the 3 over the five

5 0
3 years ago
Use binomial expansion to solve each exercise. (a) Find the coefficient of xy19 in (3x − 2y) 20.(b) Give a formula for the coeff
pishuonlain [190]

9514 1404 393

Answer:

  (a) -29,884,416

  (b) C(n,(n -k)/2) . . . where C(n,k) = n!/(k!(n-k)!) and k ∈ ℕ

Step-by-step explanation:

(a) The coefficient of the k-th term of the expansion is ...

  C(20,k)(3x)^(20-k)(-2y)^k

For k=19, this is ...

  19(3x)(-2y)^19 = -29,884,416xy^19

The coefficient of the term is -29,884,416.

__

(b) The p-th term of the expansion of (x +1/x)^n is ...

  C(n,p)(x^(n-p)(1/x)^p = C(n,p)(x^(n-2p))

For some exponent k of x, the value of p will be ...

  k = n -2p

  p = (n -k)/2

Then the coefficient of x^k will be C(n, (n-k)/2), where C(n, x) = n!/(x!(n-x)!).

You will notice that there will only be a term x^k for k having the same parity as n.

5 0
3 years ago
find the area of the sector with a central angle of 60 and a radius of 5 inches rounded to the nearest tenth
gulaghasi [49]
Sector area = (central angle / 360) * PI * radius^2
sector area = (60 / 360) * PI * 25
<span><span><span>sector area = 13.08996939 </span> square inches
</span> </span><span>sector area = 13.1 (rounded) </span><span>square inches

</span>



5 0
3 years ago
5g+6g-11g Please answer I am being timed!!!!
DiKsa [7]

Answer:

I think the answer is 0???

7 0
3 years ago
Please help me please will give brainliest ​
Inga [223]

Answer:

acute

Step-by-step explanation:

In an equilateral triangle all of the triangles angles equal 60

in an obtuse triangle one of the angles is going to be greater than 90

in a right triangle one of the angles is equal to 90

in an acute triangle all of the angles are less then 90

5 0
2 years ago
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