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Genrish500 [490]
3 years ago
13

Heeeelp !! please!!!!

Mathematics
1 answer:
Bas_tet [7]3 years ago
7 0
1.
The vowels of the 26 letters of the English alphabet, excluding y, are 5:

a, e, i, o
and u.

2.
The prime numbers less than 10 are 4:    2, 3, 5 and 7.

3.

The raffle tickets have one of {a, e, i, o,u} as the first character, and 

one of {2, 3, 5, 7} as the second character.

4. Some examples of the raffle tickets: a2, a3, e5, i7 ...

In total there are 5*4=20 possible tickets, as any of the 5 vowels can be combined with any of the 4 primes.

that is, we have a2, a3, a5, a7, e2, e3, ....u7

5.

The only vowel contained in the word "event" is e.


"the digit is the number of letters in the word event":

the word "event" has 5 letters. 

--------------------------------------------------------------------------------------------------
Remark: it is not particularly clear whether it is "the number of letters" or "the number of different letters", in which case there would be 4.

For example, if Adam is asked how many letters are there in his name, we expect him to say "4", unless specifically asked "how many different letters are there"
--------------------------------------------------------------------------------------------------

The ticket which matches the description can only be e5

6.

P(e5)=(number of ways e5 may occur)/(total number of tickets)= 1/20=0.05


Answer: 1/20 = 0.05
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Hey You!

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20. ANSWER:

The fish swims 28 feet deep.

21. ANSWER:

Numerator;Denominator

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439 / 3 = 146.3333 repeat.

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3 years ago
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Pls help me with my homework​
katovenus [111]
9^-2 = 1/81 or 0.0123
When there is a negative in front of the exponent it makes a fraction. It is usually just 1/the number it equals if it were positive.
4 0
2 years ago
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Please help! I will mark as brainliest IF answer is right. <3
Ksju [112]

Answer:

y =  -  \frac{11}{2} x + 30 \frac{1}{2}

or

y = 30 \frac{1}{2}  -  \frac{11}{2} x

if accepted:

2y =  - 11x + 61

or

2y = 61 - 11x

8 0
2 years ago
1) Given P(A) = 0.3 and P(B) = 0.5, do the following.
Delicious77 [7]

Answer:

1) a) 0.8

b) 0.6

2) a) 0.08

b) 0.14

Step-by-step explanation:

1) Given

P(A) = 0.3 and P(B) = 0.5

Let us learn about a formula:

P(A\ or\ B) = P(A) +P(B) -P(A\ and\ B)\\OR\\P(A\cup B) = P(A) +P(B) -P(A\cap B)

(a) If A and B are mutually exclusive i.e. no common thing in the two events.

In other words:

P(A\ and\ B) = P(A \cap B) = 0

Using above formula:

P(A\ or\ B) = P(A) +P(B) -P(A\ and\ B)\\\Rightarrow P(A\ or\ B) = 0.3 + 0.5 -0 = \bold{0.8}

(b)  P(A and B) = 0.2

Using above formula:

P(A\ or\ B) = P(A) +P(B) -P(A\ and\ B)\\\Rightarrow P(A\ or\ B) = 0.3 + 0.5 -0.2 = \bold{0.6}

*************************************

1) Given

P(A) = 0.4 and P(B) = 0.2

Let us learn about a formula:

P(A\ and\ B) = P(B) \times P(A/B)  for dependent events

P(A\ and\ B) = P(A) \times P(B) for independent events.

(a) If A and B are independent events :

Using the above formula for independent events:

P(A\ and\ B) = 0.4 \times 0.2 = \bold{0.08}

(b)  P(A / B) = 0.7

Using above formula:

P(A\ and\ B) = P(B) \times P(A/B) = 0.2 \times 0.7 = \bold{0.14}

6 0
3 years ago
Please help, what is t^2-4=0
likoan [24]

Answer:

you can use quadratic formula for this equation

= − ±√ ² − 4  ÷2

8 0
2 years ago
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