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Vladimir79 [104]
3 years ago
6

Which expression can be used to model the phrase "the sum of three and a number"?

Mathematics
1 answer:
Brut [27]3 years ago
8 0

Answer:

3 + X

Step-by-step explanation:

because the word sum is only used in addition.

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Shaun has five coins in his pocket. If he empties the coins onto a table, what is the probability that all five coins will land
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Answer:

A. 1/32

Step-by-step explanation:

Ok, the probability for one of the coins to land on heads is 1/2 cause a coin have to sides and chance is 50% that it will land on either of its sides.

If you have 2 coins the probability will be 1/2 for the first coin to land on heads and 1/2 for the second one. The overall probability for 2 coins would be (1/2)*(1/2)=1/4. You could also see it is 1/4 because all of the possible combinations of 2 coins are 4 (HH, HT, TH, TT) and HH is one of four.

It's the same if you have 5 coins. The probability will be (1/2)*(1/2)*(1/2)*(1/2)*(1/2)=1/32 in other words HHHHH is one of 32 possible combinations of 5 coins.

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\rule{100mm}{0.1mm}

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\dfrac{\cos^2(2x)}{\sin^2(2x)} +[(\cos^2(2x)+\sin^2(2x)]=\csc^2(2x)

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                                     \boxed{\csc^2(2x)=\csc^2(2x)} ✔

\rule{100mm}{0.1mm}

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