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Mathematics

1 answer:

Soloha48 [4]4 years ago

3 0

Composite is a number that is NOT prime. So we want to find an odd perfect square that IS prime to be a counterexample.
√36 = Not odd
√49 = 7 Factors only 1 * 7 so it is prime
√81 = 9 Factors 1, 3, 9 composite
√225 = 15 Factors 1,3, 5,9,15, 25, 45, 75, 225 composite

Counterexample for 2∧n - 1 Is prime
2^6 - 1 = 64 - 1 = 63 NOT PRIME Factors are: 1, 3, 7, 9,21, 63
2^5 - 1 = 32 - 1 = 31 Prime
2^3 - 1 = 8 - 1 = 7 Prime
2^2 - 1 = 4 - 1 = 3 Prime

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How many pairs of numbers add up to 11?l have used calculation find their is 6 pairs But like to know • How could I change how I

Rasek [7]

If all numbers are greater than zero and no repeated numbers exist these are the 5 possible combinations:

1 + 2 + 8
1 + 3 + 7
1 + 4 + 6
2 + 3 + 6
2 + 4 + 5.

If one number is allowed to be zero and no repeated numbers exist these are 5 combinations:
 0 + 11
1 + 1 + 9
2 + 2 + 7
3 + 3 + 5
4 + 4 + 3
5 + 5 + 1

Hope this helps

6 0

3 years ago

Read 2 more answers

At the store deli, Rita spent $13.45 on 5 pounds of cheese.

defon

Answer:

$5.38

Step-by-step explanation:

$13.45 / 5 (To find the value of 1 pound of cheese, Total money spent divided by total pound of cheese bought)

$2.69 (1 pound of cheese will cost)

So, $2.69 x 2 (Multiply by 2 to find how much 2 pound of cheese will cost)

$5.38