X= width
length= 3x-7
Area: (x)(3x-7)=40
= 3x^2-7x=40
= 3x^2-7x-40=0
Factorise the equation: (3x+8)(x-5)=0
x=-8/3 (reject because width cannot be negative) or x=5
so width is 5cm and length is 3(5)-7= 8cm !
Answer:
A. 10, 15, 15, 18, 22, 25, 28, 35, 36
Step-by-step explanation:
Stem and leaf plot
1 | 0 5 5 8
2 | 2 5 8
3 | 5 6
Example : 1 | 0 means 10
So, considering the examples :
1 | 0 5 5 8
10,15,15,15,18
2 | 2 5 8
22,25,28
3 | 5 6
35,36
So, the data set is 10,15,15,15,18,22,25,28,35,36
So, Option A is true
width = 13
length = 30
p=2l + 2w
86 = 2(2w+4) + 2w
86 = 4w + 8 + 2w
86= 6w + 8
78 = 6w
13 = w
86 = 2l + 2(13)
86 = 2l + 26
60 = 2l
30 = l
check your work.
l is 4 centimeters more than twice w
twice w = 26
plus 4 = 30
i hope you understand. ask questions if not
K=-1 or k=5
either quantity could equal zero, so put each quantity equal to zero and solve for k.
hope this helps :)
Make a box of whisker plot for the data what is the upper quartile value 42,48,43,65,58,47,60,56,52,64,51,66,56,62
Gemiola [76]
First, you would want to reorder the numbers from least to greatest.
42,43,47,48,51,52,56,56,58,60,62,64,65,66
Then find the median which is 56
Next add all upper quartile numbers so 56+58+60+62+64+65+66=431
Last divide the sum of the upper quartile by the median to get the upper quartile value. 431/56= <span>7.69642857</span>
