Hello,
Sorry, i don't know the theorem in English
"Théorème des angles extérieurs :
la mesure en degré d’un angle extérieur est égale à la moitié de la différence des arcs interceptés par ses côtés."
Here
2x+15=1/2(10x+20-80)
==>4x+30=10x-60
==>6x=30+60
==>6x=90
==>x=15 °
Answer:
8%
Step-by-step explanation:
Length = 30 cm
It increases by 10 %
The increase is 30*.10 = 3
New length = old length + increase
30+3
33 cm
Width =20
It increases by 5%
The increase is 20 *.05 = 1
New width = old width + increase
=20+1
21
Old perimeter = 2(l+w) = 2(30+20) = 2(50) = 100
New perimeter = 2(l+2) = 2(33+21) =2(54) = 108
Percent increase = (new - old)/old * 100%
= (108-100)/100 * 100%
= 8/100*100%
=8%
Answer:
0.23
Step-by-step explanation:
A formula I like to use to find the answer to these types of questions is
first, multiply 828×100=82,800
now divide 82800÷3600=23
so your answer is 23%==0.23
What are all your answer choices