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Usimov [2.4K]
3 years ago
15

1 3/5 + 8 1/2

Mathematics
2 answers:
soldi70 [24.7K]3 years ago
8 0
Your answer is b because the common denominator is 10 and so just look at my pic
vodka [1.7K]3 years ago
5 0
The answer would be B 10 1/10
(If you want me to explain I can)

Hope this helps

Have a great day/night
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X over 45 - 7 over 9. X = ?
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Answer:

X=35

Step-by-step explanation:

simplify 7/9

x/45-7/9=0

simplify x/45

x - (7 • 5)/45=  x - 35/45

x-35/45=0

add 35  to both sides

x=35

I tried it's hard to write it all out on here i just to give u the best sorry :)

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An inscribed angle that intercepts a semicircle measures is a(n) ———- angle
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Step-by-step explanation:

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Find the 4th term of the expansion of (x+2)^5.​
djyliett [7]

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Please help me this is for a grade
IgorC [24]

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3 years ago
Suppose that two teams play a series of games that ends when one of them has won ???? games. Also suppose that each game played
Musya8 [376]

Answer:

(a) E(X) = -2p² + 2p + 2; d²/dp² E(X) at p = 1/2 is less than 0

(b) 6p⁴ - 12p³ + 3p² + 3p + 3; d²/dp² E(X) at p = 1/2 is less than 0

Step-by-step explanation:

(a) when i = 2, the expected number of played games will be:

E(X) = 2[p² + (1-p)²] + 3[2p² (1-p) + 2p(1-p)²] = 2[p²+1-2p+p²] + 3[2p²-2p³+2p(1-2p+p²)] = 2[2p²-2p+1] + 3[2p² - 2p³+2p-4p²+2p³] =  4p²-4p+2-6p²+6p = -2p²+2p+2.

If p = 1/2, then:

d²/dp² E(X) = d/dp (-4p + 2) = -4 which is less than 0. Therefore, the E(X) is maximized.

(b) when i = 3;

E(X) = 3[p³ + (1-p)³] + 4[3p³(1-p) + 3p(1-p)³] + 5[6p³(1-p)² + 6p²(1-p)³]

Simplification and rearrangement lead to:

E(X) = 6p⁴-12p³+3p²+3p+3

if p = 1/2, then:

d²/dp² E(X) at p = 1/2 = d/dp (24p³-36p²+6p+3) = 72p²-72p+6 = 72(1/2)² - 72(1/2) +6 = 18 - 36 +8 = -10

Therefore, E(X) is maximized.

6 0
3 years ago
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