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mel-nik [20]
3 years ago
6

Batteries for an MP3 player usually cost $8.00, but they are on sale for 40% off. What is the discount amount? What is the sale

price for these batteries? WILL MAKE BRAINLIEST!!! PLEASE HELP
Mathematics
1 answer:
Elanso [62]3 years ago
3 0
4.80

Minimal currency form:

$1 $1 $1 $1
50 cents
25 cents
5 cents

Calculation:
$8.00
- .40 (40%)
————


$8.00
-$3.20
————
$4.80

(This is for US dollars only)
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Factor completely x3 - y3
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Answer:

(x-y)(x^2+xy+y^2)

Step-by-step explanation:

x^3 - y^3=(x-y)(x^2+xy+y^2)

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A new photocopier works 4 times as fast as an old one. When the machines work together, a university can produce all its staff m
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5.29

Step-by-step explanation:

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Can’t see the numbers
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A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books. What is the probability
Gnesinka [82]

Answer:

Probability that one of them is mathematics and other two are either physics or history books = 0.51

Step-by-step explanation:

Given - A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books.

To find - What is the probability one of them is mathematics and other two are either physics or history books ?

Solution -

Given that,

A student needs to select 3 books from 3 different mathematics, 3 different physics and 1 history books.

So,

Total number of books = 3 + 3 + 1 = 7

The student has to select 3 books

So, Total number of ways = ^{7} C_{3} = 35

So,

Probability that one of them is mathematics and other two are either physics or history books is -

= \frac{^{3} C_{1}. ^{4} C_{2}  }{^{7} C_{3}}

= \frac{(3)(6)}{35}

= \frac{18}{35}

= 0.51

⇒Probability that one of them is mathematics and other two are either physics or history books = 0.51

8 0
3 years ago
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