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Alecsey [184]
3 years ago
9

HELP!!!

Mathematics
1 answer:
yulyashka [42]3 years ago
6 0
0.40x + 55 = 0.15x + 80
0.40x - 0.15x = 80 - 55
0.25x = 25
x = 25 / 0.25
x = 100 minutes <=
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A website requires a four-digit numerical password in which the digits cannot repeat. How many possible passwords are there? . .
Law Incorporation [45]

Answer:  B) 5040

Step-by-step explanation:

Since total number of digits are 10 ( which are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9)

And, According to the question, website requires a four-digit numerical password in which the digits cannot repeat.

Therefore, required possible arrangement = 10_P_4

=\frac{10!}{(10-4)!}

= \frac{10!}{6!}

= \frac{10\times 9\times 8\times 7\times 6!}{6!}

= 10 × 9 × 8 × 7 = 5040

Thus, The required possible password is 5040.

5 0
3 years ago
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Evaluate 72 - 12 x 5 – 3(43 = 8)
Masja [62]

Answer:

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Step-by-step explanation:

3 0
3 years ago
I need help with this question
postnew [5]

Answer:

61 cm for each book shelf.  

Step-by-step explanation:

First it gives you the width of the boxes so you add them together

132 + 108 + 94 = 334

so 334 cm has already been used out of 456 cm.  

Next you will 456 - 334 = 122 cm left over

if they are building 2 book cases you with take what cm's you have left and divide it by 2

122 / 2 = 61

So that means each book case will be 61 cm's wide

7 0
4 years ago
Please solve 3.07 × 10 ^ − 7
vlabodo [156]
You are close : 0.000000307
7 0
4 years ago
Simplify. Brainliest, help asap! &lt;3
Mariana [72]
-4 for the first one and 2/3 for the second
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