## anonymous one year ago I would really appreciate if someone could help me with the following questions below. I really really stink at this.

1. anonymous

Here it is

2. anonymous

$$\Large\rm\color{orange}{Welcome~to~OpenStudy!}$$ We can help you but you'll have to figure the answers out on your own because this is a quiz.

3. anonymous

No worries that's what I'm looking for.

4. anonymous

@just_one_last_goodbye @GreatGuy

5. anonymous

@Australopithecus

6. phi

any idea what the little "red marks" mean in your picture?

7. anonymous

What red marks are you referring to?

8. phi

the little red lines on AB and BC

9. anonymous

No clue tbh

10. anonymous

the red ticks indicate that AB and BC are equal in length so if AB = 80 you have your answer. This is standard for any problem so commit it to memory; if there are more then one set of lines with same lengths they are indicated with two tick marks each for second set etc.

11. phi

oh. When you see a "hash mark" like those, it means the two line segments are the same length

12. phi

so you should think: from A to B is some distance. and from A to C is twice the distance from A to B

13. anonymous

Okay so it would be 160

14. phi

now you need to read what they told you. what did they tell you ?

15. phi

do you see the question: if AC is 80 ... that means the distance from A to C is 80 (inches, miles, whatever) they want to know A to B we know AB + BC = AC (the two halves add up to the whole)

16. anonymous

ahh 40

17. phi

yes.

18. phi

For Q6, if AB is 28, then BC is what ?

19. phi

it is the same picture and the same idea

20. anonymous

56

21. phi

AB and BC are the same size (that is what the red lines mean)

22. anonymous

So they are both 28?

23. phi

yes AB and BC are both 28

24. phi

they say BC is also 3x+7 so if BC =28 and BC= 3x +7 we can say 3x+7= 28 can you "solve for x" ?