3 years ago

(5x - 3) - (-4x + 1)

Mathematics

1 answer:

AveGali [126]3 years ago

4 0

Answer:

9x-4

Step-by-step explanation:

add 5x and 4x

9x-3-1

subtract 1 from -3

9x-4

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Sunny_sXe [5.5K]

36/48 simplified is 3/4

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Miriam is picking out some movies to rent, and she is primarily interested in comedies and foreign films. She has narrowed down

Keith_Richards [23]

Answer:

There are 795 combinations.

Step-by-step explanation:

The number of ways or combinations in which we can select k element from a group of n elements is given by:

$nCk=\frac{n!}{k!(n-k)!}$

So, if Miriam want to choose 3 movies with at least two comedies, she have two options: Choose 2 comedies and 1 foreign film or choose 3 comedies.

Then, the number of combinations for every case are:

1. Choose 2 Comedies from the 10 and choose 1 foreign film from 15. This is calculated as:

$10C2*15C1=\frac{10!}{2!(10-8)!}*\frac{15}{1!(15-14)!}$

$10C2*15C1=675$

2. Choose 3 Comedies from the 10. This is calculated as:

$10C3=\frac{10!}{3!(10-3)!}=120$

Therefore, there are 795 combinations and it is calculated as:

675 + 120 = 795

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3 years ago

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Simplify each expression. Use positive exponents. A^4b^-3 ab^-2

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$\dfrac{a^4b^{-3}}{ab^{-2}}$

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