Answer:
I think it might be 124 feet
Use cos(t+s)=cos (t)cos (s)- sin(x)sin (1)
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<em>Graph in attachment!</em>
The length of EC will be 7.5 cm
Given DE || BC AD = 4cm, DB = 6cm, AE = 5cm
According to basic proportionality theorem- IF A LINE IS DRAWN PARALLEL TO ONE SIDE OF THE TRIANGLE INTERSECTING THE OTHER TWO SIDES, THEN IT DIVIDES IN THE SAME RATIO.
So,
In triangle ABC, DE || BC in the figure given below:
AD/AB = AE/AC……(1)
Now AB can be written as AD+DB similarly AC= AE+EC……(2)
Applying (2) in (1)
AD/AD+DB = AE/AE+EC……(3)
Applying values of AD,DB and AE from the question in equation (3)
4/(4+6) = 5/(5+EC)
4/10 = 5/(5+EC)
(10*5)/4 = 5+EC
EC = 7.5cm
Learn more about similar triangle at :
brainly.com/question/2644832
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Answer:
122.5
Step-by-step explanation:
Let the student normal score be 100
In the beginning score increased by 40%
Hence score at the beginning =100+40 = 140%
Now before end score decreased by 25%
Decrease = 25% of 140 = 35
Hence score at the end of month = 140-35 = 105
Average score for the month
= Total of scores of end and beginning month /2
=
To the nearest tenth is 290 and to the nearest hundreth is 300