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frozen [14]
3 years ago
5

It takes 6 cubes to build a staircase with 3 steps. How many cubes does it take to build a staircase with 7 steps?

Mathematics
1 answer:
liraira [26]3 years ago
6 0

Answer:

14

Step-by-step explanation:

if 6=3

x=7

2 cubes is for each step×3=6

2×7=14

14 cubes

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There are 10 seniors in the class, from which 4 should be chosen by the teacher. The order of the chosen students does not matter. This means that we speak of combinations. THe equation for calculating the number of possible combinations is:
C=N!/R!(N-R), where N is the total number of objects and R is the number of objects we select from the N 
In our case, N=10, R=4.
C= 10!/4!*6!=10*9*8*7*6!/6!*4*3*2*1=<span>10*9*8*7/24=5040/24=210
There are 210 different ways for the teacher to choose 4 seniors in no particular order.</span>
6 0
4 years ago
I need help I don't understand this.
AleksAgata [21]

Answer:

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Step-by-step explanation:

angle 1+40°=104°(sum of two non adjacent interior angles is equal to opposite exterior angle)

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angle 1=64°

3 0
3 years ago
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kifflom [539]
Rachel saved enough money and she used 14/15

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4 years ago
What is the fraction ten twelfths in its simplest form
Leokris [45]
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What is the standard form of the number shown in this calculator display?
dem82 [27]

Answer:

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Step-by-step explanation:

Put the 3 in the 8th spot to the left of the decimal point and fill in the other digits to the right of it.

  38,200,000

__

The first spot immediately to the left of the decimal point has a place value of 10^0, so the location with a place value of 10^7 is the 8th spot left of the decimal point. You should be able to get the idea from the attached.

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If you put your calculator in the appropriate display mode, it should show you the number in this form.

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