I have two questions that I am greatly in need of assistance. I took these in a pretest, and cannot for the life of me understand them. :/
If you could please help me step by step, I would be greatly appreciated. Will metal too!
Here they are, simple I know____
The perimeter of a rectangle is 64 units. Can the length x of the rectangle can be 20 units hen its width y is 11 units?
Second_
-4(x+1)-3=-3(x-4)
For the second one I started off doing:
-4(x-1)-3=-3(x-4)
-4x-4 -3=-3x-12
+3x +3x
-1x-4-3=-12
+4 +4
-1x-3=-12
+3 +3
-1x=-12
-1x -1x

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- anonymous

For the first one I did use the formula: p=2l+2w

- LynFran

if the perimeter= 64 units with the width y=11 units then;
length=(p/2)width
so, x=(p/2)y
substituting those values we get
x= (64/2)(11)
x=?

- anonymous

x = 352 ?

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## More answers

- anonymous

Maybe I was doing it wrong when I was doing the formula:
p=2l*2w
64=(2*20)*(2*11)
40 * 22
40*22 = 880

- anonymous

Yeah, I still don't understand how you received 352. I'm sorry. :(

- LynFran

no x=21

- anonymous

I don't disregard that your answer is wrong, I just can't comprehend it. Maybe another way of explaining it?

- LynFran

i made a mistake it shd be
p=2(l+w)
and we want ''l'' so
divide both side by 2 we get
p/2=l+w
now take away w from both sides wee get
(p/2)-w=l

- LynFran

so substituting into that we get
(64/2)-11=length

- anonymous

Ah. Okay, now I can see it. I was so focused on trying to use the length that was provided, that it was incorrect. Thank you.

- anonymous

Could you help me on my other question if you have time?

- LynFran

for the second question
-4(x+1)-3=-3(x-4)...just making sure its this ..see u wrote (x-1) when u started it..

- anonymous

Ops, yeah its (x+1) sorry typo

- anonymous

The second step would start out like this: -4x+-4-3=-3x-12
I know that you need to get all the variables on one side of the equation, preferable the left side.

- LynFran

ok so
-4(x+1)-3=-3(x-4)
we can start by multiplying out parentheses
so -4x-4-3=-3x+12
simplify -4x-7=-3x+12
add (3x) and (7) to boh sides we get
-4x+3x=12+7
simplify
-x=19
then divide by -1
x=-19

- anonymous

Okay:
You would finally have -1x-7=12
then adding the seven to both sides of the equation.
Finally you would have -1x=19
divide -1x by both sides and get x = -19
Ah, I see the mistake on my part, but thank you so much for your time.

- anonymous

Have a nice night, thank you again! @ LynFran
I made sure I gave you a metal.

- LynFran

ok... welcome ...

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