6TH Grade Math.. I'm Lost Pls Help?

Question

Here is the picture for the questions:

http://img144.imageshack.us/img144/5354/cindimathte8.png

21. If AC = 4x + 5 and DC = 3x + 8, find AC.

22. If M(angle sign)BCE= 45 and M(angle sign)ECD= 65, find M(angle sign)BCD

23. If M(angle sign)FCA =40, find M(angle sign)FCD

Thank YOU!

Answer 1

for  21 u set AC and DC = to each other so u have 4x+5=3x+8 and then u solve for x which is x=3 then u plug that back into ur equation for AC so u have AC= 4(3) + 5 and then u do that out so its 17

Answer 2

false

Answer 3

According to the picture AC = DC

4x-3x = 8-5

x = 3

AC = 17

(angle)BCD = 110(degrees)

180 - 40 = 140(degrees) = (angle)FCA

Answer 4

21. bout tree fiddy

22. at least a 100

23. over 9000

Answer 5

21.

ac=dc

4x+5=3x+8

x+5=8

x=3

4(3)+5=ac

ac=17

22.

For that one, BCE and ECD are both part of angle BCD. To get BCD, all you would need to do would be to add the two smaller angles together to get the larger one. BDC=110

23.

If you were to add FCA and FCD together you would get a straight line. The angle of a straight line is 180. In this case all you would need to do would be to subtract FCA from 180.

180-40=140

FCD=140

Answer 6

21 if i had time to think id figure it out... but i dont :/

22. 110 degrees

23. 140

Answer 7

ghjgfuytrjweyrgwehjgrjhwgrhjwetruwtweyrw...

Answer 8

geez!!!! you are onw advanced little 6th grader. im in high school and cant help with that

Answer 9

X=3

Bcd=110

Fcd=30

Answer 10

6th grade = g*y