Question

Question below. please help

Answer 1

So what is the perimeter of a triangle?

Answer 2

perimeter means the sum of the lengths of all the sides...

Answer 3

the perimiter of the triangle is 63 units

Answer 4

first you need to find x, and this can be found using the perimeter

Answer 5

The perimeter is 3x. Is it asking for a numerical answer?

Answer 6

no, its asking for the length of side PR

Answer 7

the sum of all the sides is 63, and from the diagram you know that it also equals to 6x + 3 (just add all of it together)

Answer 8

The answer is 30.

Answer 9

set it equal, and you have x. After you know what that is, just fine the length of PR (multiply your number x with 3)

Answer 10

30 is right :)

Answer 11

The perimeter is the length of every side added together. Therefore, the perimeter is 3x + x + 1 + 2x + 2. This simplifies to 6x + 3. Because the perimeter equals 63, 6x + 3 = 63. You want to isolate x, so subtract 3 from both sides. Now you have 6x = 60. Divided both sides by 6 to get x by itself. Now you know that x = 10. Because the length of PR is 3x, just plug 10 into that and you get 3 times 10, which equals 30.

Answer 12

what about the second one i just posted

Answer 13

I wanted to explain the first problem. Hopefully you understand it.

Answer 14

Thanks so much, lots of help. but the second one is a little different. can you help with the second one

Answer 15

I think that you posted the same one.

Answer 16

opps yes i did! sorry! im going to post the new one now

Answer 17

Okay, so the problem doesn't tell you the length of PQ, right?

Answer 18

nope just says the rectangle is 130 units

Answer 19

Well you do know the length of SR and because this is a rectangle, SR is the same length as PQ. The two sides have the same length, right?

Answer 20

yes so the answere would be 5y - 1?

Answer 21

It must be a numerical answer, 50 for example.

Answer 22

Just like the last problem.

Answer 23

ohh okay, so how do i find it? sorry i'm confused

Answer 24

PQ is the same as SR and SP is the same as RQ, right?

Answer 25

yes

Answer 26

Because of this, you would multiply SR by 2 and RQ by 2, correct?

Answer 27

Because they are the same, you are adding 5y - 1 to 5y - 1 and 4y + 3 to 4y + 3, correct?

Answer 28

correct

Answer 29

Because you are trying to find the perimeter, you are adding all of the sides together. Now you have 5y - 1 + 5y - 1 + 4y + 3 + 4y + 3, correct?

Answer 30

yes

Answer 31

so it would be 18y+6?

Answer 32

Can you simplify this?

Answer 33

18Y + 6

Answer 34

Sorry, didn't see that.

Answer 35

Close, but what about the -1s?

Answer 36

-1 + -1 = -2. You forgot to add that to 6. Because you are combining like terms, you are going to add -1 to -1 to 3 to 3. What does that equal?

Answer 37

so 18Y + 4

Answer 38

Correct!

Answer 39

so i would devid 4 by each side?

Answer 40

Each side of what?

Answer 41

devid 4 by 18?

Answer 42

18y + 4 is one side. What is the other?

Answer 43

what do i do with the 18y + 4

Answer 44

18y - 4 = 130, correct?

Answer 45

yes so thats the answer?

Answer 46

Wrong. 18y + 4 = 130, not 18y - 4.

Answer 47

so how do i do that?

Answer 48

I was just making sure you were paying attention.

Answer 49

Your goal is to isolate x. How do you do that?

Answer 50

I am i just get confused with - and +

Answer 51

Oh, okay. Sometimes I am too. :)

Answer 52

by subtracting 4 on each side? i thinl

Answer 53

I actually made that mistake ALL THE TIME in 7th grade. :p

Answer 54

subtract 4 off of 18y

Answer 55

Correct! Subtract 4 from each side.

Answer 56

Now what do you have?

Answer 57

14y

Answer 58

No, you subtract 4 from 4, not from 18y.

Answer 59

oh so all thats left would be 18y

Answer 60

You want to get rid of 4. To do that, you subtract it from itself.

Answer 61

Correct. You would be left with 18y. What would you have on the other side?

Answer 62

what other side

Answer 63

You have 18y = 130. The perimeter of the rectangle is 130.

Answer 64

You are subtracting 4 from both sides.

Answer 65

so now devid 18 from 130?

Answer 66

No, you have to subtract 4 from both sides. 18y + 4 = 130. When you subtract 4 from both sides, what do you get?

Answer 67

18y=126

Answer 68

Yes! Now you can divide 18 from both sides. :)

Answer 69

answere will be 7

Answer 70

Correct.

Answer 71

That is not the final answer, however.

Answer 72

yay! thanks so much

Answer 73

Your goal is to find the length of PQ.

Answer 74

7 isnt the answer

Answer 75

y = 7. Your goal is to find the length of PQ. Because PQ is the same as SR, PQ equals 5y - 1. Because you know the value of y, you can plug it into 5y -1. Do you understand?

Answer 76

so answere is 34

Answer 77

yay i was right!! i have one more! can you please give me the answere in message?

Answer 78

@micahpkay

Answer 79

Oh, sorry. I left for a while.

Answer 80

Wow! This one looks REALLY hard. O_O

Answer 81

Just add up the sides. What do you get?

Answer 82

the perimeter formula is 2(l + w). So, in this case it's 2(5z + 4z + 3) = 18z + 6 = 222. Then just solve for z :)

Answer 83

so it would be 32z + 9 = 222?

Answer 84

no, i already multiplied it by two, and its 18z + 6 = 222

Answer 85

so now do i subtract 6 from 222

Answer 86

O.o... It's just 222-6, so it's 216

Answer 87

so now it's 18z = 216

Answer 88

so 216 devided by 18 now?

Answer 89

yes