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2 years ago

Simplify -2|-1+5| Thank youuu P.S. I got -8. Is that right?

Mathematics

1 answer:

Minchanka [31]2 years ago

6 0

Answer:

-8.

Step-by-step explanation:

-2|-1+5|

The absolute value function |-1+5| = |4| = 4

-2 * 4 = -8.

You are right.

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2. At Fly-Right Airlines, passengers are informed that checked bags must weigh 40 lb or less, or they will have to pay a fee for

Ilya [14]

Answer:

see below

Step-by-step explanation:

a) w <= 40 lbs

b) Do you have any bag that weigh 0 lbs or negative lbs?

We need to rewrite the inequality so that these are not there

0<= w <= 40 lbs

6 0

3 years ago

1. You have three standard decks of cards in front of you. What is the probability of drawing a heart card from all three decks?

Paladinen [302]

Answer:

1.56%

Step-by-step explanation:

A standard deck of cards has 52 cards, and 13 of these are hearts, as there are 4 suits, and 52/4=13. This means the probability of choosing a heart card from a deck of cards is 1/4, or 25%. Now to find the probability of doing this from 3 decks in a row, we simply cube 1/4 to get 1/64, and in percentage this is ~1.56%.

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2 years ago

In how many ways can ann, bob, chuck, don and ed be seated in a row such that ann and bob are not seated next to each other?

balandron [24]

The 5 people can seat in a row in 5! ways
But we need to exclude the ways that ann and bob are seated next to each other which is = 4! * 2!

So, the number of ways can ann, bob, chuck, don and ed be seated in a row such that ann and bob are not seated next to each other = 5! - 4! * 2! = 72

=====================================================

Another solution:

If ann seated in one of the ends, the number of ways = 3*2

If ann didn't seat in one of the ends , the number of ways = 2*3

So, the total number of ways that can ann, bob be seated = 3*2 + 2*3 = 12

The remaining persons can seat with a number of ways = 3! = 6
So, the total ways that the five persons can seat = 12*6 = 72

7 0

2 years ago

Last week f40 fifth graders went on a field trip to the science museum

Xelga [282]

8 out of 40 fifth graders went to see the lab animal presentation. This can be written as this expression:

$\frac{8}{40}$

Find the greatest common factor of 8 and 40:

Factors of 8: 1, 2, 4, 8
Factors of 40: 1, 2, 4, 5, 8, 10, 20, 40

Therefore the greatest common factor is 8. Divide both the numerator and the denominator by 8.

$\frac{8}{40} = \frac{8/8}{40/8} = \frac{1}{5}$

Therefore the fractional part is $\frac{1}{5}$ .

To get the percentage, you need to get the denominator to a value of 100.

To do so, you need to find the value to multiply both the numerator and denominator by to achieve this.

To get this value, you can divide 100 by the denominator of the fractional value.

$100 / 5 = 20$

Then you can multiply both the numerator and denominator by 20:

$\frac{1}{5} = \frac{1 * 20}{5 * 20} = \frac{20}{100}$

From here, the numerator will state the percentage:

$20\%$

Hope this helps :)

8 0

2 years ago

Read 2 more answers

Please help!!! I really confused

Viktor [21]

Answer:

91in in feet 7.5ft

Step-by-step explanation:

5 0

2 years ago