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Elis [28]
3 years ago
7

Show that 6^3-1 is divisible by 5 using our identities

Mathematics
2 answers:
Doss [256]3 years ago
8 0

Answer:

Step-by-step explanation:

a³-b³=(a-b)(a²+ab+b²)

6³-1=6³-1³=(6-1)(6²+6*1+1²)=5×43

so 6³-1 is divisible by 5.

Harlamova29_29 [7]3 years ago
5 0

\displaystyle 6^3 - 1 = 216 - 1 = 215

The number 215 is divisible by 5 because it ends in 5, according to the <em>divisibility</em><em> </em><em>rules</em>.

I am joyous to assist you anytime.

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Mazyrski [523]
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7 0
3 years ago
jessica's mother gave her 70 chocolates to give to her friends. She gave 3 chocolates to each of her friends at the party and ha
Blizzard [7]

Answer:

She had 22 friends at her graduation party.

Step-by-step explanation:

70 chocolates total minus 3 chocolates times the number of friends she had at the party = 4

70-3x=4

Subtract 70 from both sides of the equation

-3x=4-70

Simplify

-3x=-66

Divide both sides of the equation by -3

-3x/-3=-66/-3

Simplify

x=22

8 0
3 years ago
Ava's birthday cake is about 11 7/10 cm long. her candles stick up from the cake an additional 5 4/10 cm. what was the total hig
Virty [35]

Total height of the cake and the candles is 17.1 cm

Step-by-step explanation:

  • Step 1: Convert the mixed fractions into decimal expressions.

11 7/10 cm = 117/10 = 11.7 cm

5 4/10 cm = 54/10 = 5.4 cm

  • Step 2: Find total height of the cake and the candles

Total height = 11.7 + 5.4 = 17.1 cm

3 0
4 years ago
Read 2 more answers
There are 120 people on the bus 50% get off at the first stop 20% get off at the second stop. The rest get off on the third stop
padilas [110]

Answer:

36

Step-by-step explanation:

so 50% of 120 is just half of it. so that would be 60. Then 20% of 120 is 24 so subtract that from 60 and you get 36.

5 0
3 years ago
Which term contains a coefficient?<br> m + 3n + p + 3
natulia [17]
The answer is 3n because the 3 is the coefficient
7 0
3 years ago
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