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Inessa05 [86]
3 years ago
15

A store recived a delivery that consists of x boxes that weight 30 pounds each and y boxes that weight 20 pounds each. There are

64 total boxes in the delivery and they have combined weight of 1400 pounds .
Enter the number of boxes in the delivery that weight 20 pounds.

______boxes
Mathematics
1 answer:
seraphim [82]3 years ago
8 0

let no of x box=q

let no of y box=p

30q+20p=1400

3q+2p=140

2q+2p+p=140

128+q=140(q+p=128)

q=12

p=52

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Suppose 300 nursing students took a certification test that is worth 100 points.
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225 students scored 65 or better and 75 students scored 88 or better.

Step-by-step explanation:

We are given that The five-number summary for the scores of 300 nursing students are given :

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Q_1 is the first quartile and is the median of the lower half of the data set. 25% of the numbers in the data set lie below Q_1 and about 75% lie above Q_1 .

Q_3 is the third quartile and is the median of the upper half of the data set. 75% of the numbers in the data set lie belowQ_3 and about 25% lie above Q_3

i) .About how many students scored 65 or better?

Q_1 = 65

Since we know that 75% lie above Q_1 .

So, Number of students  scored 65 or better = 75\% \times 300 = \frac{75}{100} \times 300 =225

ii)About how many students scored 88 or better?

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Since we know that 25% lie above Q_3

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