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goldenfox [79]
2 years ago
14

A fair coin is tossed four times. a. Find the probability that the outcome is HTTH in that order. b. Find the probability that e

xactly two heads are obtained.
Mathematics
1 answer:
Zanzabum2 years ago
6 0

Answer:Four heads trust me.

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9x+3y=18 whats is the equation when solved for y
lidiya [134]

Answer:

y=6-3x

Step-by-step explanation:

first subtract 9x from 9x+3y=18

                                   -9x       -9x

so you get 3y=18-9x or 3y=-9x+18 then divide both sides by 3

so you get y=6-3x hope this helps :)

6 0
2 years ago
Solve the equation, and check the solutions √(x+9)/4=3.
nadya68 [22]

Answer:

Solution: x = 135

Step-by-step explanation:

Hi there!

First, let´s write the equation:

√(x + 9) /4 = 3

Multiply by 4 both sides of the equation

√(x + 9) = 12

square both sides of the equation

x + 9 = 144

subtract 9 to both sides of the equation

x = 135  

Let´s check the solution:

√(x + 9) /4 = 3

x = 135

√(135 + 9) /4 = 3

√(144) /4 = 3

12/4 = 3

3 = 3

Then, x = 135 is the solution to the equation.

Have a nice day!

8 0
3 years ago
How many<br>weeks are there in 81 days​
natima [27]

Answer: At least 8

Reason: A week has 7 days in it, so when you divide 81 by 7, you get 7.5, so when you round it, you get the number 8

<u><em>If you have any questions, corrections, or problems, let me know. I hope this helped</em></u>

4 0
2 years ago
16. A scientist measured the average flying speeds of 25 species of birds.
garik1379 [7]
The answer would be c
3 0
3 years ago
Read 2 more answers
Xx squared - XY + x squared - xy ​
EastWind [94]

Answer and Step-by-step explanation:

x^{2} - xy + x^{2} -xy\\\\2x^{2} -2xy

This is the answer.

4 0
2 years ago
Read 2 more answers
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