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3 years ago

13

Dave Flip a coin 20 times and got heads on eight of the flips Based on Dave's results what is the experimental probability of th

e coin landing on heads?

1 answer:

Elodia [21]3 years ago

8 0

Four tenths, .4 or 8/20

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X=−4a 2 +3ab+12b 2 Y=9a 2 +ab−7b 2 Y+X=Y+X=Y, plus, X, equals

dimaraw [331]

Answer:

5a

2

+4ab+5b

2

Step-by-step explanation:

step 1. (((0-(4•(a2)))+3ab)+(12•(b2)))+(((9•(a2))+ab)-7b2)

step 2. (((0-(4•(a2)))+3ab)+(12•(b2)))+((32a2+ab)-7b2)

step 3.(((0-(4•(a2)))+3ab)+(22•3b2))+(9a2+ab-7b2)

step 4. (((0-(4•(a2)))+3ab)+(22•3b2))+(9a2+ab-7b2)

step 5. 5.1 Factoring 5a2 + 4ab + 5b2

6 0

3 years ago

A neighborhood swimming pool is the shape of a rectangular prism the pool measures 30 feet in length and 18 feet in width and ha

lesya [120]

Answer:

15,120 gallons of water

Step-by-step explanation:

to find the volume, your equation is

v=length * width * height

v=30*18*4=2160 feet cubed

2160*7=15120

6 0

2 years ago

A cylindrical rain barrel has a radius of 2 feet and holds a total of 30 cubic feet of water. How tall is the rain barrel? Use 3

BabaBlast [244]

B. 2.39 feet. xoxo
pls rate my answer and mark me:))

3 0

3 years ago

Read 2 more answers

The scores on an exam are normally distributed with a mean of 77 and a standard deviation of 10. What percent of the scores are

Shtirlitz [24]

<span>The correct answer between all the choices given is the second choice, which is 16%. I am hoping that this answer has satisfied your query and it will be able to help you in your endeavor, and if you would like, feel free to ask another question.</span>

5 0

3 years ago

Read 2 more answers

Someone please help

AleksandrR [38]

Replace y with 31:

31 = 7x -4

Add 4 to both sides:

35 = 7x

Divide both sides by 7:

x = 5

Input x = 5

6 0

2 years ago