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4 years ago

How many 5 digit codes are possible if the first digit cannot be 0 or 1 and digits can be repeated?

Mathematics

1 answer:

lisov135 [29]4 years ago

5 0

Answer:

80000

Step-by-step explanation:

The first digit is the only one with any constraints: it cannot be 1 or 0. This leaves us with 8 options (2, 3, 4, 5, 6, 7, 8, 9).

The other four digits have no such conditions, so we have 10 choices for each of them (0-9, inclusive).

So!

8 * 10 * 10 * 10 * 10 = 80000 :))

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Kobotan [32]

Answer:

n=17

Step-by-step explanation:

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3 years ago

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Divide 9x4 - 6x2 + 3x2 by 3x2 -1.

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Answer:

3x^2 is the final solution

See the image below for step by step explanation.

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3 years ago

HELP URGENT STEP FUNCTIONS!!!!!!! Used books cost $2.25 each. Which expression represents the total number of books that can be

irinina [24]

Answer:

A. $\left \lfloor \frac{10}{2.25} \right \rfloor$

Step-by-step explanation:

We are given,

The cost of one book = $2.25

Since, it takes $2.25 to buy 1 book.

The, for $10, we can get $\frac{1}{2.25}\times 10$ i.e. $\frac{10}{2.25}$ = 4.44

Since, number of books cannot be in decimals.

So, the closest integer to 4.44 is 4.

Hence, we can buy 4 books from $10.

Now, according to the options:

A. $\left \lfloor \frac{10}{2.25} \right \rfloor = \left \lfloor 4.44\right \rfloor = 4$

B. $\left \lceil \frac{10}{2.25} \right \rceil = \left \lceil 4.44 \right \rceil=5$

C. $\frac{10}{\left \lceil 2.25\right \rceil} =\frac{10}{3} =0.33$

D. $\frac{10}{\left \lfloor 2.25\right \rfloor} = \frac{10}{2} = 5$

Hence, we see that from the options, A is correct.

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3 years ago

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Use the diagram above and round your answer to the nearest hundredth. If a is 6 in. and angle a = 31º, what is b?

Romashka [77]

<span>If angle B = 60, and angle C is a right angle, then angle A is 30 degrees
tan 30 = b/c
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c = 17.32 ...</span>

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3 years ago

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Solve the given portion 10/a= 15/24 x=?

kramer

Answer:

$a = 16.$

Step-by-step explanation:

$\frac{10}{a} = \frac{15}{24}$

Then

$15 \times a = 24 \times 10$

$a = 240 \div 15$

Therefore

$a = 16.$

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3 years ago