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Leya [2.2K]
3 years ago
14

Someone help ASAP will give brainliest

Mathematics
1 answer:
bogdanovich [222]3 years ago
3 0
The 3rd answer, is correct.
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How many 4 digit numbers consisting of only the digits 2,4,6 and 8 are divisible by 4
Blababa [14]

Answer:

  • digits used once: 12
  • repeated digits: 128

Step-by-step explanation:

In order for a number to be divisible by 4, its last two digits must be divisible by 4. This will be the case if either of these conditions holds:

  • the ones digit is an even multiple of 2, and the tens digit is even
  • the ones digit is an odd multiple of 2, and the tens digit is odd.

We must count the ways these conditions can be met with the given digits.

__

Since we only have even numbers to work with, the ones digit must be an even multiple of 2: 4 or 8. (The tens digit cannot be odd.) The digits 4 and 8 comprise half of the available digits, so half of all possible numbers made from these digits will be divisible by 4.

<h3>digits used once</h3>

If the numbers must use each digit exactly once, there will be 4! = 24 of them. 24/2 = 12 of these 4-digit numbers will be divisible by 4.

<h3>repeated digits</h3>

Each of the four digits can have any of four values, so there will be 4^4 = 256 possible 4-digit numbers. Of these, 256/2 = 128 will be divisible by 4.

7 0
2 years ago
Read 2 more answers
Help me with this<br>pls​
irinina [24]

Answer:

reflection from the x-axis

6 0
3 years ago
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What is the value of the expression?<br> 2 1/4 divided by 1 2/5
ad-work [718]

Answer:

45/28

Step-by-step explanation:

Convert them to mixed fractions

(2 * 4 + 1) / 4 ÷ (1 * 5 + 2) / 5

8 + 1 / 4 ÷ 5 + 2 / 5

9/4 ÷ 7/5

Flip the second fraction and flip the sign - to multiply.

9/4 × 5/7

9 × 5 = 45

4 × 7 = 28

45/28

This could be left as a fraction or converted to a number:

1.60714285714

4 0
3 years ago
Read 2 more answers
In a rectangle, the length is five times the width.
8_murik_8 [283]

Answer:The perimeter =12w

Step-by-step explanation:

Let the width represent W and Length represent L

Length= 5 x width

L=5W

W=W

Since perimeter =2(L+w)

Substitute for L=5w

=2(5w+w)

=2(6w)

=12w

3 0
2 years ago
Answer me this it isn't very hard 17+4x= 43+x<br> find x i didnt even find this out but go ahead
irakobra [83]

Answer: X = 8.67

Step-by-step explanation:

4 0
3 years ago
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