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2 years ago

Simplify this algebraic expression. z- 4/4+8 A. Z-7 B. Z+9 C. 2-3 D. Z+7

Mathematics

2 answers:

Katarina [22]2 years ago

5 0

Answer:

Z-4/4+8

Z - 1 + 8

Z + (-1 + 8)

Z + 7

Oduvanchick [21]2 years ago

3 0

Answer:

(D) : Z+7

Step-by-step explanation:

−

}}

z−1+8

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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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ankoles [38]

Answer:

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Step-by-step explanation:

a reciprocal is a number that when multiplied by a given number gives 1 as product.

16 * x = 1

x = 1/16

9/10 * x = 1

x = 10/9

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