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zero101
29.08.2020 •
Mathematics
Andy watches 10 television shows every week. He watches dramas, comedies, and reality shows. Dramas are 1 hour long, comedies are 30
minutes, and reality shows are 2 hours long. He spends 8 hours watching his shows and watches twice as many comedies as dramas. Which
system of equations could be used to determine how many of each type of show he watches each week?
Оа
b
d+C+r= 8 d + .5€ + 20 = 10 c = 2d
d+C+ r = 10 d + 5c + 2r = 8 d = 20
d+ C + r=10 d + 5c +2r = 8 C= 2d
d+C+ r = 8 d + C + 2r = 10 d = 20
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d
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Ответ:
Step-by-step explanation:
Let d= dramas
c= comedies
r= reality shows
Dramas are 1 hour long, comedies are 30 minutes, and reality shows are 2 hours long.
Total time spent on watching =![1 \times(d) + 0.5 \times (c) +2 \times(r)= d+0.5c+2r](/tpl/images/0734/3634/3f6b1.png)
[
]
Since he spent 8 hours for this, that means
He watches twice as many comedies as dramas.
i.e.
→ second equation
So, the system of equations could be used to determine how many of each type of show he watches each week:
Ответ:
x=31
Step-by-step explanation:
the two triangle are equal and congruent so : ∠B=∠E=61
the sum of angles of a triangle=180
∠D+∠C+∠E=180
2x+57+61=180
2x=180-(61+57)
2x=180-118
2x=62
x=62/2=31
measure of ∠D is 62