Can someone help me please? I will fan you and give a medal.

Question

isuckatschool43 · Answer

attachment

isuckatschool43 · Answer

I think they are different in that the fractions are flipped, in order to reverse the operation.

liziekay · Answer

They are different because one has a reciprocal and one uses the distribution property.

isuckatschool43 · Answer

@liziekay Can you help me with some more please?

liziekay · Answer

Sure!

isuckatschool43 · Answer

attachment

isuckatschool43 · Answer

I'm not sure how to do this one @liziekay

evoker · Answer

Break it down into a rectangle and a half circle

isuckatschool43 · Answer

the rectangle is 40ft long and 15ft wide right

skullpatrol · Answer

The radius of the circle is 15ft, right?

isuckatschool43 · Answer

isnt that the diameter?

skullpatrol · Answer

Nope, look at the dotted line carefully.

isuckatschool43 · Answer

okay so the radius is 15ft... then what? im not that good at this :(

skullpatrol · Answer

So, first what is the question asking for?

skullpatrol · Answer

Always begin with that^ question.

isuckatschool43 · Answer

an equation to determine the... perimeter?

skullpatrol · Answer

What is perimeter?

isuckatschool43 · Answer

the continuous line forming the boundary of a closed geometric figure.
so we cant just look for the perimeter because this isnt a closed shape?

skullpatrol · Answer

Indeed, so what do you think we can find?

isuckatschool43 · Answer

the distance around the shapes? so the 80ft from the parallel lines and then __ from the circle?

skullpatrol · Answer

Very good!

Recall C = 2pi*r

isuckatschool43 · Answer

so for the circle, 2$$2\pi*15$$

isuckatschool43 · Answer

should i use 3.14 or pi?

skullpatrol · Answer

Yes, use 3.14. 

But you only have half of a circle, right?

isuckatschool43 · Answer

yes
so we divide the answer by 2?

skullpatrol · Answer

Divide the circumference by 2.

isuckatschool43 · Answer

c = 94.2?

skullpatrol · Answer

Yes.

isuckatschool43 · Answer

and then 94.2/2 = 47.1

skullpatrol · Answer

Yes.

isuckatschool43 · Answer

is the next step to add the values? 40+40+47.1?

skullpatrol · Answer

Yes, but you're not finished.

isuckatschool43 · Answer

oh, what do i do after that?

skullpatrol · Answer

You need the distance straight across the bottom, because of the definition of a "perimeter" requires a "closed figure," right?

isuckatschool43 · Answer

yes, but if it is not closed we dont need that measurement right?

skullpatrol · Answer

But then it would not, by definition, be a perimeter. Which is what the question is asking for. Correct?

isuckatschool43 · Answer

I thought that it was just asking for the distance of the sides in the diagram, not the whole perimeter

skullpatrol · Answer

Does the question state the word "perimeter"?

isuckatschool43 · Answer

Nope

skullpatrol · Answer

What does it say?

isuckatschool43 · Answer

"Write and solve an equation to determine how many feet of fencing are needed."
So it is asking for the distance of the sides we have..?

skullpatrol · Answer

You are correct.

isuckatschool43 · Answer

so 40+40+47.1 was the last step?

skullpatrol · Answer

Yes.

isuckatschool43 · Answer

the feet of fencing needed it 127.1ft?

skullpatrol · Answer

Looks good :-)

isuckatschool43 · Answer

okay, awesome, thanks
i have one more that im confused on, but is probably really simple, could you help with this last one please?

skullpatrol · Answer

Close this question and post  a new question please.

isuckatschool43 · Answer

got it