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3 years ago

Please simplify the expression, I can give brainliest :)

Mathematics

1 answer:

zalisa [80]3 years ago

6 0

Answer:

12 1/9 $\sqrt{3}$

Step-by-step explanation:

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Will give brainlest if correct, and 5 stars.<br><br> Solve for x

guapka [62]

Answer:

x = 54

Step-by-step explanation:

These angles are complementary because they add up to 90:

x - 7 + 43 = 90

x + 36 = 90

x = 90 - 36

x = 54

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3 years ago

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F(20) = 1000 * (1.09)n

lapo4ka [179]

Answer:

= 21800

N = 2f/109

Step-by-step explanation:

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2 years ago

What is albgrea pls i am a 5th grade

Vilka [71]

Answer:

the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.

Step-by-step explanation:

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3 years ago

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You and a friend play a game where you each toss a balanced coin. If the upper faces on the coins are both tails, you win $1; if

oksian1 [2.3K]

Answer: The mean and variance of Y is $0.25 and $6.19 respectively.

Step-by-step explanation:

Given : You and a friend play a game where you each toss a balanced coin.

sample space for tossing two coins : {TT, HT, TH, HH}

Let Y denotes the winnings on a single play of the game.

You win $1; if the faces are both heads

then P(Y=1)=P(TT)= $\dfrac{1}{4}=0.25$

You win $6; if the faces are both heads

then P(Y=6)=P(HH)= $\dfrac{1}{4}=0.25$

You loose $3; if the faces do not match.

then P(Y=1)=P(TH, HT)= $\dfrac{2}{4}=0.50$

The expected value to win : E(Y)= $\sum_{i=1}^{i=3} y_ip(y_1)$

$=1\times0.25+6\times0.25+(-3)\times0.50=0.25$

Hence, the mean of Y : E(Y)= $0.25

$E(Y^2)=\sum_{i=1}^{i=3} y_i^2p(y_i)\\\\=1^2\times0.25+6^1\times0.25+(-3)^2\times0.5\\\\=0.25+1.5+4.5=6.25$

Variance = $E[Y^2]-E(Y)^2$

$=6.25-(0.25)^2=6.25-0.0625=6.1875\approx6.19$

Hence, variance of Y = $ 6.19

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4 years ago

60 minutes is 20% of what

damaskus [11]

Answer:

300

Step-by-step explanation:

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3 years ago