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Lisa [10]
3 years ago
9

The distribution of waiting time for an elevator in an office building is shown above. What is the probability you’ll have to sp

end between 30 and 70 seconds waiting for the elevator?
Mathematics
1 answer:
Oxana [17]3 years ago
7 0

Answer:

I don't think this question can be answered without more info

You might be interested in
8. 6r + 5 = 4 6 - 7y -20 ​
Rudiy27

Answer: r=-7/6y+7/2

Step-by-step explanation:

Step 1: Add -5 to both sides.

6r+5+−5=−7y+26+−5

6r=−7y+21

Step 2: Divide both sides by 6.

6r/6=-7y+21/6

3 0
3 years ago
HDTV screens usually have a width-to -height ratio of 16:9. Which screen dimensions are in the same proportion?
love history [14]

Answer:

4 feet by 3 feet

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  

Please have a look at the attached photo.  

My answer:

width-to -height ratio of 16:9

Let analyse all possible answers:

  • 4 feet by 3 feet

16 divided by 4 is the same as 9 divided by 3 => it is true

  • 28 inches by 21 inches

16 divided by 28 is different as 9 divided by 21 => it is wrong

  • 48 centimeters by 27 centimeters

16 divided by 48 is different as 9 divided by 27 => it is wrong

  • 26 inches by 19 inches

16 divided by 26 is different as 9 divided by 219=> it is wrong

We choose A.

Hope it will find you well.

7 0
3 years ago
What is the smallest value of x, such that
gizmo_the_mogwai [7]

Answer:

Dude, where's the picture?

8 0
3 years ago
Factorise : x³ + x - 3x² -3​
ANEK [815]

Answer:

(x²+1)(x-3)

Step-by-step explanation:

Factorize x³ + x - 3x² -3​

x³-3x²+x-3

Factorize

x²(x-3)+1(x-3)

= (x²+1)(x-3)

Hence the factorized form is (x²+1)(x-3)

6 0
3 years ago
Angles of a triangle
PilotLPTM [1.2K]

Answer:

180 -93+37= 180 -124 = 56

Step-by-step explanation:

interior angles of a triangle are 180 degrees

so 180 - 124 = 56

6 0
3 years ago
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