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chubhunter [2.5K]
2 years ago
8

The length of a rectangle is 3 cm greater than its width. The perimeter is 24 cm. Find the dimensions of the rectangle. 3 cm, 9

cm 4.5 cm, 7.5 cm 7.5 cm, 10.5 cm 10.5 cm, 13.5 cm
Mathematics
1 answer:
jenyasd209 [6]2 years ago
6 0

Length (L): w + 3

width (w): w

Perimeter (P) = 2L + 2w

                24 = 2(w + 3) + 2(w)

                24 = 2w + 6 + 2w

                24 = 4w + 6

                18 = 4w

                18/4 = w

                9/2 = w

                4.5 = w

Length (L): w + 3   = 4.5 + 3   = 7.5

Answer: width = 4.5 cm, length = 7.5 cm

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If the green line has a slope of -4, then the red line has a slope of -4

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What is the value of the expression below? (4/5+3/5)+3.5x5<br>​
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18.9

Step-by-step explanation:

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7 0
2 years ago
According to the National Education Association (NEA), teachers generally spend more than 40 hours each week working on instruct
abruzzese [7]

Answer:

The median number of hours worked per week for the sample of 13 high school science teachers is 52.

Step-by-step explanation:

Median of a data set:

The median of a data set is the element that separates the lower 50% of the set from the upper 50%.

If the cardinality n of the set is odd, the median is the element at the position (n+1)/2 of the sorted sed.

If the cardinality n of the set is even, the median is the mean between the elements at the position n/2 and (n/2)+1 of the sorted sed.

In this question:

Hours worked for the sample of 13 high school science teachers:

55, 58, 52, 52, 56, 59, 48, 63, 52, 52, 50, 52, 56

Sorting in an ascending way:

48, 50, 52, 52, 52, 52, 52, 55, 56, 56, 58, 59, 63

Cardinality of 13, so odd, the median is the element at the 13+1/2 = 7th position of the sorted set, which is 52.

The median number of hours worked per week for the sample of 13 high school science teachers is 52.

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