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kogti [31]
3 years ago
13

Help fast plz jdkdvehdk​

Mathematics
2 answers:
lions [1.4K]3 years ago
6 0

4/5+3/5 = 7/5 = 1.4

3.5X5 = 17.5

1.4 + 17.5 = 18.9 = 18 9/10

GREYUIT [131]3 years ago
3 0
Answer :

18.9

Explanation:

You have to do what’s in the ()
First so that would be 4/5+3/5= 7/5

Next convert 7/5 to a decimal that would be 1.4

Then do 3.5•5= 17.5

Lastly add 17.5+1.4= 18.9

Hope this helped!
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Answer:

P(n,r) = \dfrac{n!}{(n-r)!}

Step-by-step explanation:

We have to fill the blank.

The number of permutations of n elements taken r at a time is given by the formula:

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Permutation is an arrangement of subsets of a larger set in regard with order of the arrangement.

where n is the the larger set and we have to choose r items from n such that there is no repetition.

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4 years ago
Write a polynomial function of minimum degree in standard form with real coefficients whose zeros and their multiplicities inclu
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root -2 multiplicity 3 means
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so the function is
(x-1)^2(x+2)^3
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f(x)=x^5+4x^4+3x-10x^2-4x+8
(x-1)^2(x+2)^3

6 0
4 years ago
Read 2 more answers
Oscar caught a fish that weighed 4 1/6 pounds and then caught another that weighed 6 5/8 pounds. How much more did the second fi
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The second fish was heavier by almost 2.5 pounds

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4 0
3 years ago
CosA + cosB - cosC = -1 + 4cosA/2 cosB/2 sinC/2
Lubov Fominskaja [6]

Answer:

Step-by-step explanation:

(cos A+ cos B)-cos C

=2cos \frac{A+B}{2}cos \frac{A-B}{2}-cos C~~~...(1)\\A+B+C=180\\A+B=180-C\\\frac{A+B}{2}=90-\frac{C}{2}\\cos \frac{A+B}{2}=cos(90-\frac{C}{2})=sin \frac{C}{2}\\cos C=1-2sin^2\frac{C}{2}\\(1)=2 sin \frac{C}{2} cos \frac{A-B}{2}-1+2sin^2\frac{C}2}\\=2sin\frac{C}{2}[cos \frac{A-B}{2}+sin \frac{C}{2}]-1~~~...(2)\\\\now~again~A+B+C=180\\C=180-(A+B)\\sin\frac{C}{2}=sin(90-\frac{A+B}{2})=cos \frac{A+B}{2}\\(2)=2sin\frac {C}{2}[cos \frac{A-B}{2}+cos \frac{A+B}{2}]-1\\

=-1+2sin\frac{C}{2}*2cos \frac{\frac{A-B}{2} +\frac{A+B}{2} }{2} cos \frac{\frac{A-B}{2} -\frac{A+B}{2} }{2} \\=-1+4sin\frac{C}{2} cos \frac{A}{2} cos\frac{-B}{2} \\=-1+4 cos \frac{A}{2} cos \frac{B}{2} sin \frac{C}{2}\\(cos(-B)=cos B)

8 0
4 years ago
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