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alekssr [168]
1 year ago
9

SOMEONE PLS HELP ME ASAP ON THESE QUESTIONS!!!!!!!

Mathematics
1 answer:
Amanda [17]1 year ago
4 0

Answer:

Step-by-step explanation:

7. the median is better than the mean because it isn't influenced by extremely large values. it is generally better to use the median as opposed to the mean for a simple reason: the mean or average is very sensitive to outliers (abnormally low or high values), while the median is much less affected by outliers.

8.

A median chart is a special-purpose variation of the X-bar chart. This chart uses the median instead of the subgroup average to show the system's central location. The median is the middle point when data points are arranged from high to low. The chart shows all the individual readings.

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Swimming Pool On a certain hot​ summer's day, 143 people used the public swimming pool. The daily prices are $ 1.25 for children
kramer

Answer: 102 children and 41 adults swam at the pool that day.

Step-by-step explanation:

Let x represent the number of children that swam at the public pool that​ day.

Let y represent the number of adult that swam at the public pool that​ day.

On that certain hot​ summer's day, 143 people used the public swimming pool. It means that

x + y = 143

The daily prices are $1.25 for children and $2.25 for adults. The receipts for admission totaled $219.75. It means that

1.25x + 2.25y = 219.75- - - - - - - - -1

Substituting x = 143 - y into equation 1, it becomes

1.25(143 - y) + 2.25y = 219.75

178.75 - 1.25y + 2.25y = 219.75

- 1.25y + 2.25y = 219.75 - 178.75

y = 41

x = 143 - y = 143 - 41

x = 102

5 0
3 years ago
What is the completely factored form of 25x4 – 16y2?
erastovalidia [21]

Answer:

(5x^2+4y)(5x^2-4y)

Step-by-step explanation:

25x^4-16y^2 has the form a^2-b^2 known as a difference of squares. It factors into (a+b)(a-b). To find a and b you take the square root.

\sqrt{25x^4} =5x^2

\sqrt{16y^2} =4y

The factored for is (a+b)(a-b).

In this case, it is (5x^2+4y)(5x^2-4y)


3 0
3 years ago
Read 2 more answers
The average life of a certain type and brand of battery is 75 weeks. The average life of each of 9 randomly selected batteries i
Artyom0805 [142]

Answer:

Option A

Step-by-step explanation:

Since at. 0.05 level of significance, the p value was great than 0.05 but less than 0.1, we will fail to reject the null and conclude that the sample data does not provide enough evidence that the average life of the batteries is greater than 75 weeks.

7 0
3 years ago
Rewrite sin^2 2xcos ^2 2x as an expression in terms of the first power of cosine
zavuch27 [327]

Answer:

Step-by-step explanation:

use the formula { a couple of times} cos 2 Θ = 2 cos ² Θ - 1 = 1 - 2 sin ² Θ....your answer will likely have a cos  2x , a cos 4x , and a cos 6x in it.....note : cos ² Θ - sin ²Φ = cos ( Θ + Φ) cos (Θ - Φ) will also be needed for appropriate choices of Θ & Φ in terms of x

8 0
2 years ago
If the price of 23 toys are $276, then what will be the price (Rs.) of 12 toys​
aliya0001 [1]

Answer:

Price of 23 toys = $276

Price of 1 toy =

276 \div 23 \\  = 12 \: dollars

Price of 12 toys =?

Price of 12 toys =

12 \times 12 \\  = 144 \: dollars

4 0
2 years ago
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