Step-by-step explanation:
Given that,
DE = 8x - 13
EF = 5x + 17
DF = x + 21
Also,
DE = EF
which means that,
8x - 13 = 5x + 17
8x - 5x = 17 + 13
3x = 30
x = 30/3
x = 10
Now,
DE = 8x - 13 = 8×10 - 13 = 80 - 13 = 67cm
EF = 5x + 17 = 5×10 + 17 = 50 + 17 = 67cm
DF = x + 21 = 10 + 21 = 31cm
17000
This time its thousands not hundreds, so you do 17 plus 000 wich would be thousands, like this
one thousand
1
thousand
000
:)
Answer:
-19
Step-by-step explanation:
Answer:
1×-5= -5squared =25+(4×-4squared)=25+(-16)=9
