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sashaice [31]
3 years ago
11

Helpppp pleaseeee xxxxx

Mathematics
1 answer:
ivolga24 [154]3 years ago
8 0

Answer:

b=7 b=26 b=25

Step-by-step explanation:

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See image for question.​
Ostrovityanka [42]

Answer:

  • See below

Step-by-step explanation:

#3

  • P(A) = 3/8
  • P(B) = 2/7

(i)

  • P(A and B) = P(A) * P(B) = 3/8*2/7 = 3/28

(ii)

  • P(A or B) = P(A) + P(B) - P(A and B) = 3/8 + 2/7 - 3/28 = 1/56(21 + 16 - 6) = 31/56

(iii)

  • P(not A and not B) = P(not A) * P(not B) = (1 - 3/8)*(1 - 2/7) = 5/8*5/7 = 25/56

<u>Another way:</u>

  • P(not A and not B) = 1 - P(A or B) = 1 - 31/56 = 25/56

#4

Outcomes with two fair coins: TT, TH, HT, HH

Outcomes with normal dice: 1 to 6

a)

  • P(odd number) = 3/6 = 1/2

b)

  • P(two heads and an even number) = 1/4*3/6 = 1/8

c)

  • P(head and tail) = 1/2
  • P(prime) = 3/6 = 1/2 (primes are 2, 3 and 5)
  • P(head, tail and prime) = 1/2*1/2 = 1/4

d)

  • P(two tails and odd number) = 1/4*3/6 = 1/8
4 0
2 years ago
PLEASE HELP QUICKLY !!!!!!Select all the expressions that are equivalent to 78.7.
Anni [7]

Answer: 7^18/7^9, (7^3)^3 & 7^4 * 7 ^ 5.

The second, third & last options are the answers

These equations equal 40,353,607 btw

5 0
2 years ago
The lowest temperature on May 15 is 23 as warm as the warmest temperature on May 15. The lowest temperature on May 15 is 60ºF.
Damm [24]
90 i believe shhdjddiejxjjdjddjfi
5 0
3 years ago
Read 2 more answers
451 mi + 7.2 hr = ___ ___ (Round to the appropriate number of significant digits.)
gladu [14]

Answer:

Step 1: Enter the number in the respective input field

Step 2: Now click the button “Solve” to get the answer

Step 3: Finally, the significant figures of the number will be displayed in the output field

What is Meant by Significant Figures?

In Mathematics, the significant figures define the number of important single digits that contribute to the degree of accuracy of the given number. The five important rules for the significant figures are as follows:

All the non zero numbers are significant figures

The zero present in between the non zero numbers are significant figures

The leading zeros are not significant

The trailing zeros present at the right side of the decimal point are significant figures

Trailing zeros of the number without a decimal point are not significant figures

The trailing zeros present in the whole number with the decimal point are significant figures

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8 0
2 years ago
Which line will have no solution with the parabola y – x 2 = x2?
Klio2033 [76]

Step-by-step explanation:

y = –3x –3

y = –2x –3

y = 2x –3

y = 3x –3

3 0
2 years ago
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