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Vlad1618 [11]
2 years ago
13

Helppp ! please and thank you .

Mathematics
1 answer:
Gnoma [55]2 years ago
6 0

Answer:166

Step-by-step explanation:

SA=2lw+2lh+2hw so 2*4*5+2*7*5+2*7*4

so 40+70+56=166

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Pls help me 20 points
horsena [70]

Answer: 36

Step-by-step explanation:

-3 to the power of -2 is 9

2 to the power of 1 is 4

when you multiply that u get 36

3 0
2 years ago
In a popular tale of wizards and witches, a group of them finds themselves in a room with unmarked doors which change position,
SSSSS [86.1K]

Answer:

Expected number of hours before the the group exits the building = E[Number of hours] = 3.2 hours

Step-by-step explanation:

Expected value, E(X) is given as

E(X) = Σ xᵢpᵢ

xᵢ = each variable

pᵢ = probability of each variable

Let X represent the number of hours before exiting the building taking each door. Note that D = Door

D | X | P(X)

1 | 3.0 | 0.2

2 | 3.5 | 0.1

3 | 5.0 | 0.2

4 | 2.5 | 0.5

E(X) = (3×0.2) + (3.5×0.1) + (5×0.2) + (2.5×0.5) = 3.2 hours

Hope this Helps!!!

7 0
2 years ago
Abbie, Beth, Carl, Diego, and Elena are waiting in line. Use the following information to figure out which of the five is first
zlopas [31]
Abbie is not next to Elena or Carl
5 0
3 years ago
HELP I'll MAKE U THE BRAINEST PLZ HELP​
Travka [436]

Answer:

y=1

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Caroline is saving up to buy a new video game .she already has $45 and can save an additional $9 per week using money from her a
notka56 [123]
9w+45= amount of money she’ll have after any amount of weeks.

So, since W is weeks... and you have 9 weeks, you do (9x9)+45.

Then you get 81+45, which is 126. She will have $126 after 9 weeks
5 0
3 years ago
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