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dexar [7]
3 years ago
9

Is 68 prime because i am doing homework and im stuck on this and it is very hard so help me please

Mathematics
2 answers:
BlackZzzverrR [31]3 years ago
8 0

If  68  is a prime number, then the only factors it has are  1  and  68.
If it has any other factors besides  1  and  68, then it's NOT prime.

Right away, without any higher math, you can look at just the last digit
in 68 .  The last digit is '8'.  That tells you that '68' is an even number,
and THAT tells you that '2' must be one of its factors.  So '68' is not a
prime number.

The factors of  68  are  1,  2,  4,  17,  34, and  68 .    

68  has four more factors besides  1  and  68, so it's not a prime number.

Diano4ka-milaya [45]3 years ago
8 0
No, it's not. 68 can be divided by 2
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Answer:

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Select the two correct solutions of the inequality 2x + 3 &gt; 16
alukav5142 [94]
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Given the diagram below, what is cos(45*)? <br><br> A.<br><br><br> B.<br><br><br> C.<br><br><br> D.
alina1380 [7]

Answer:

The answer is option B

Step-by-step explanation:

To find cos 45° we must first find the adjacent and the hypotenuse

Let the adjacent be x

Let the hypotenuse be h

To find the adjacent we use tan

tan ∅ = opposite / adjacent

From the question

the opposite is 9

So we have

tan 45 = 9 / x

x tan 45 = 9

but tan 45 = 1

x = 9

Since we have the adjacent we use Pythagoras theorem to find the hypotenuse

That's

h² = 9² + 9²

h² = 81 + 81

h² = 162

h = √162

h = 9√2

Now use the formula for cosine

cos∅ = adjacent / hypotenuse

The adjacent is 9

The hypotenuse is 9√2

So we have

cos 45 = 9/9√2

We have the final answer as

<h3 /><h3>cos 45 = 1 / √2</h3>

Hope this helps you

3 0
3 years ago
What is 2 - 3y is less than or equal to 12? That was the question.
Ivenika [448]

Answer:

2-3y\leq 12\\-2+2-3y\leq 12-2\\-3y\leq 10\\\frac{-3}{3}y\leq  \frac{10}{3} \\y\geq \frac{10}{3}

Step-by-step explanation:

8 0
3 years ago
PLEASE HELP I NEED HELPPPPPP
seraphim [82]
I was working on it until I saw it was only 5 points. Sorry bro
5 0
3 years ago
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