4 years ago

In this triangle, what is the value of x?

Mathematics

1 answer:

Ratling [72]4 years ago

4 0

E= MC2 sfbjwkfcbu'ao{Isfbobczc zmcnoiaokncklznlksnc

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How many different strings of length 12 containing exactly five a's can be chosen over the following alphabets? (a) The alphabet

N76 [4]

Answer:

Part (A) The required ways are 792.

Part (B) The required ways are 101376.

Step-by-step explanation:

Consider the provided information.

Part (A) The alphabet {a, b}

The length of strings is 12 that containing exactly five a's.

The number of ways are: $\frac{12!}{5!7!}$

After filling "a" we have now 7 places.

For 7 places we have "a" and "b" alphabet but we already select a's so now the remaining place have to fill by "b" only.

Thus, the required ways are: $\frac{12!}{5!7!}\times 1=792$

Part (B) The alphabet {a, b, c}

We have selected five a's now we have now 7 places.

For 7 places we have "b" and "c".

Thus, there are 2 choices for each 7 place that is $2^7$

Therefore the total number of ways are: $792\times 2^7=101376$

Thus, the required ways are 101376.

7 0

4 years ago

Explain how to regroup 43 ones as tens and ones

zepelin [54]

The number 43 has 4 tens and 3 ones.

Now we have 43 ones given, in order to regroup them, we need to group 4 rows of 10 each and 3 rows of 1 each.

By this, we will be having:
4 rows of 10 each = 4*10 = 40
3 rows of 1 each = 3*1 = 3
which is the needed 43.

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4 years ago

To find the radius of a circle, you multiply the diameter by 2.

Helga [31]

False, you divide it.

7 0

3 years ago

Certain arithmetic sequence has the recursive formula an = an-1 + d

Liula [17]

The formula is an = 1+d

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3 years ago