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Helga [31]
3 years ago
14

Please help meeeeeeeee

Mathematics
2 answers:
Montano1993 [528]3 years ago
4 0

Answer:

\frac{2}{3} in \: mins =  \frac{2}{3}  \times 60 \\  = 40mins \\ 40 =  \frac{1}{6}  \\ therefore \: 60mins = x \\  \frac{40}{60}  =  \frac{ \frac{1}{6} }{x}  \\ 40x = 60 \times \frac{1}{6}  \\ 40x = 10 \\ x =  \frac{1}{4}

therefore per hour Harris can sew 1/4 pair of jeans

maria [59]3 years ago
3 0

1/4

2/3 in hours is 40 minutes

If he can sew 1/6 jeans in 40 minutes, then it will take him 1 hour to sew how many jeans?

NOTE: 1hour =60 minutes

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A certain new type of business succeeds 60% of the time. Suppose that 3 such businesses open (where they do not compete with eac
ella [17]

Answer:

0.216

Step-by-step explanation:

Given that a certain new type of business succeeds 60% of the time.

3 such businesses   are tested for success.

Since these three businesses open (where they do not compete with each other, so it is reasonable to believe that their relative successes would be independent). we can say X no of successful businesses is Binomial

with p = 0.6 and n =3

Required probability

=The probability that all 3 businesses succeed is:

= P(X=3)\\= 0.6^3\\= 0.216

8 0
3 years ago
The complex solution to a quadratic equation is x equals start fraction three plus or minus square root of negative 36 end squar
Naya [18.7K]
The square root of a -36 simplifies to "6i". So you have 3+/- [6i/6].  The 6's cancel each other out leaving 3+/-i.  So the "a" is 3 and the "b" is 1
4 0
3 years ago
there are 27 red or blue marbles in the bag the number of red marbles is five less than three times the number of the blue marbl
alexdok [17]
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r+b=27
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r=3b-5
subsitute 3b-5 for r in first equation
3b-5+b=27
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add 5
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3 years ago
Who does cos 60 degrees compare to cos -60 degrees
Neporo4naja [7]
Hello :
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4 years ago
Factor –7x3 21x2 3x – 9 by grouping. what is the resulting expression?
MakcuM [25]

The resulting expression on factorization by grouping method is (3-7x²)(x-3).

<h3>What is Factorization?</h3>

Factorization is a method in which an Integer or an expression is written in terms of product of its fractions.

The expression given in the question is

–7x³ + 21x² + 3x – 9

This equation has to be factorized using grouping method.

group of two or more is formed and common term is taken out.

-7x² (x -3) +3(x-3)

( -7x²+3) (x-3)

(3-7x²)(x-3)

The resulting expression on factorization by grouping method is

(3-7x²)(x-3).

To know more about Factorization

brainly.com/question/24182713

#SPJ1

5 0
2 years ago
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