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drek231 [11]
2 years ago
7

Answer ASAP!.......... I need help on 34 more questions.

Mathematics
1 answer:
lianna [129]2 years ago
4 0

19

Step-by-step explanation:

Because when you and you need don't forget that when you

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What is the mean, median and mode for...45,50,55,55,55,60,60,60,65,65,70?
Alexxx [7]

Answer:

Mean = 58.18

Median = 60

Modes = 55 and 60

Step-by-step explanation:

To find the mean/average, add up all the numbers and divide the sum by the # of numbers there are (ex. there are 11 numbers so divide the sum by 11).

The median is the middle number of a set.  In this case, the middle number is easy to see because the # of numbers is odd, but if it was even, just find the average of the two middle numbers.

The mode is/are the most frequent number(s) in the set.  In this set, the numbers that appear the most are 55 and 60.

8 0
3 years ago
Which of the pairs of events below is mutually exclusive?
Nady [450]

Answer:

Drawing an ace of spades and then drawing another ace of spades without replacement from a standard deck of cards.

Step-by-step explanation:

Given four pair of events:

1. Drawing an ace of spades and then drawing another ace of spades without replacement from a standard deck of cards

2. Drawing a 2 and drawing a 4 with replacement from a standard deck of cards

3. Drawing a heart and then drawing a spade without replacement from a standard deck of cards

4. Drawing a jack and then drawing a 7 without replacement from a standard deck of cards

To find:

Which of the pairs is mutually exclusive?

Solution:

First of all, let us have a look at the definition of mutually exclusive events.

Mutually exclusive events do not have any case in common.

In other words, two events are known as mutually exclusive when both the events can not occur at the same time.

Now, let us have a look at the given options one by one:

1. Drawing an ace of spades and then drawing another ace of spades without replacement from a standard deck of cards.

We know that there is only one ace of spades in a standard deck.

Therefore, the two events can not occur one after the other, so these are mutually exclusive events.

2. Drawing a 2 and drawing a 4 with replacement from a standard deck of cards.

The two events can occur one after the other, so these are not mutually exclusive.

3. Drawing a heart and then drawing a spade without replacement from a standard deck of cards.

Separate cards are drawn one after the other, so not mutually exclusive.

4. Drawing a jack and then drawing a 7 without replacement from a standard deck of cards.

Separate cards are drawn one after the other, so not mutually exclusive.

3 0
2 years ago
X + y = k
Nadusha1986 [10]
We are given with two equations X + y = k and <span>x - y = k. to find the solution of the </span>system<span> of linear equations, we can use elimination by adding the equations to eliminate y. hence the third equation is 2x= 2k ; x = k, hence y is equal to zero. Answer is C</span>
4 0
3 years ago
Read 2 more answers
Emily purchased three different sizes of popcorn at the movies. The medium popcorn was twice as expensive as the small popcorn.
MaRussiya [10]

Answer:

$5

Step-by-step explanation:

medium popcorn- 2x

total - $23

large- 2x+3

23=4x+3

20=4x

x=5

6 0
3 years ago
Read 2 more answers
(a)
Vika [28.1K]

Answer:

(a) Percentage of girls = 55\frac{5}{7}

(b) Percentage of boys = 44\frac{2}{7}

Step-by-step explanation:

To find percentage, we multiply the fraction out of the total by 100%.

Percentage of girls = \frac{780}{1400} × 100%

                                = 55\frac{5}{7}

Percentage of boys = \frac{1400-780}{1400} × 100%

                                 = 44\frac{2}{7}

3 0
2 years ago
Read 2 more answers
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