Question

Help please!!

Answer 1

@ganeshie8

Answer 2

these are parallelograms, the sides are equal in length with the opposite side. So on question 15 they give you the full length of side AD which tells you that side BC will be the same length. So subtract, 18.5- 3.5. The difference will give you a.

Answer 3

so a is 15?

Answer 4

yes

Answer 5

when you plug 15 into 2a it is asking you to multiply 15 by 2

Answer 6

then subtract 20.4 from that, and it will give you side AB

Answer 7

9.6 is AB?

Answer 8

yes

Answer 9

then plug 15 into a for side CD to get that side, it should be the same as AB, if not then a is not correct.

Answer 10

does it say it is a parallelogram? If its not than the opposite sides do not have to necessarily be the same length.

Answer 11

Yeah, it is.

Answer 12

So is it 2a-15?

Answer 13

I'm confused.

Answer 14

well, no it wouldn't be 2a-15. Did you get that photo from your book? Can you send me a picture of an example the book gives, then I could probably figure out where we went wrong

Answer 15

Sire, hold on.

Answer 16

I can't find one.

Answer 17

k, Ill see what I can do and get back to you asap

Answer 18

Thank you!

Answer 19

the only way this would work is if a were a different answer for each side.

Answer 20

oh never mind I just figured it out, sorry, it's been a while since I took algebra.

Answer 21

ok so what you would need to do is set up an equation for AB and CD. Which would look like 2a-20.4=a=1.6

Answer 22

2a-20.4= a+1.6 you would then need to put the varibles on one side and the integers on another. so you would subtract a from each side. leaving you with a-20.6= 1.6

Answer 23

From there add 20.4 to each side. 20.4+1.6 is 22

Answer 24

so a=22

Answer 25

I should have set it up on BC a-3.5=18.5 then add 3.5 to each side giving you 22

Answer 26

2a-20.4 is 2(22)-20.4 44-20.4 is 23.6

Answer 27

22+1.6 is 23.6 making sides AB and CD equal

Answer 28

Now on number 16 angles g and k are equal to each other and angles h and j are equal. We would need to start by setting up what they give us for g and k in an equation. which would look like 20a+30=17a+48. From here subtract 17a from each side and 30 from each side. This gives you 3a=18. Divide 3 from both sides. That should give you 6. plug 6 back into the equations 20(6)+30= 150 17(6)+48=150 these are both equal letting you know your on the right track. Now put 6 in for a on angle H. 5(6)=30 meaning J is 30 all the angles should add up to equal 360 degrees. If they don't then we went wrong somewhere.

Answer 29

Hope this helps :)

Answer 30

Thank you!