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Mathematics 7 Online
OpenStudy (abbysmith12):

What is the area of the triangle? A. http://static.k12.com/bank_packages/files/media/mathml_72b46654389abf8837674adb157137a2785768e4_1.gif B. http://static.k12.com/bank_packages/files/media/mathml_84a6e6630405aa19df0586d32ff98bb01da41668_1.gif C. http://static.k12.com/bank_packages/files/media/mathml_b44802bf9dc90b5dc551f1ec775a4709378f7dca_1.gif D.http://static.k12.com/bank_packages/files/media/mathml_13558e416f3bbac9b9713bf70b025fac40131a1a_1.gif

OpenStudy (abbysmith12):

@quin100 @WhiteFangIII @justuu @Harsha19111999 @Destinymasha @sweetburger @Destinymasha @dan815

OpenStudy (igreen):

The formula for the area of a triangle is: \(\sf A = \dfrac{1}{2} b h\) Here the base is \(\sf 16 \dfrac{3}{4}\) and the height is \(\sf 10 \dfrac{1}{2}\). So can you plug them in and solve?

OpenStudy (abbysmith12):

idk

OpenStudy (anonymous):

you can convert the base into16.75 and the height to 10.50 to make it easier

OpenStudy (abbysmith12):

@ganeshie8 @welder_454 @Radelp @gavin39

OpenStudy (igreen):

\(\sf A = \dfrac{1}{2} \times 16 \dfrac{3}{4} \times 10 \dfrac{1}{2}\)

OpenStudy (anonymous):

so 16.75*10.50= what?

OpenStudy (igreen):

Actually @WhiteFangIII we should keep them as fractions..because the answers are in fraction from.

OpenStudy (anonymous):

o ok my bad

OpenStudy (abbysmith12):

@lexie<3

OpenStudy (anonymous):

we could turn them into incomplete fractions right?

OpenStudy (abbysmith12):

so is it A B C or D?

OpenStudy (abbysmith12):

@TheRaggedyDoctor

OpenStudy (abbysmith12):

@ScarlettGrace<3 @TheRaggedyDoctor @Radelp @party_girl @lexie<3 @Coolsector

OpenStudy (igreen):

We can first convert the two fractions into improper fractions: \(\sf 16 \dfrac{3}{4} \rightarrow \dfrac{4 \times 16 + 3}{4} \rightarrow \dfrac{67}{4}\) \(\sf 10 \dfrac{1}{2} \rightarrow \dfrac{2 \times 10 + 1}{2} \rightarrow \dfrac{21}{2}\) So we have: \(\sf A = \dfrac{1}{2} \times \dfrac{67}{4} \times \dfrac{21}{2}\) \(\sf A = \dfrac{1 \times 67 \times 21}{2 \times 4 \times 2}\) Can you multiply all of that?

OpenStudy (igreen):

Yep, but that's 'improper' not 'incomplete' @WhiteFangIII

OpenStudy (anonymous):

try using this: 16 3/4 can be converted into 48/4 and 10 1/2 can be converted into 10/2 if im not mistasken

OpenStudy (anonymous):

derp

OpenStudy (igreen):

Can you multiply \(\sf 67 \times 21\)? @AbbySmith12

OpenStudy (abbysmith12):

so which answer choice is it

OpenStudy (anonymous):

67*21=1407

OpenStudy (abbysmith12):

1407

OpenStudy (anonymous):

yup

OpenStudy (abbysmith12):

can u please hurry up

OpenStudy (anonymous):

is 1407 an answer?

OpenStudy (igreen):

Now what's \(\sf 2 \times 4 \times 2\)?

OpenStudy (igreen):

That's not the complete answer. @WhiteFangIII

OpenStudy (anonymous):

dang i suck at this!

OpenStudy (igreen):

Lol

OpenStudy (igreen):

Can you multiply \(\sf 2 \times 4 \times 2\)? @AbbySmith12

OpenStudy (abbysmith12):

16

OpenStudy (anonymous):

go SeaHawks!! :3

OpenStudy (igreen):

-.-

OpenStudy (anonymous):

lol

OpenStudy (igreen):

Yes, so that gives us: \(\sf \dfrac{1407}{16}\) Can you divide that? @AbbySmith12

OpenStudy (abbysmith12):

please hurry up and idk

OpenStudy (igreen):

Just put it in your calculator and it will give you the answer.

OpenStudy (igreen):

@WhiteFangIII Please let her do it on her own :l

OpenStudy (abbysmith12):

mine said 87.9875

OpenStudy (anonymous):

crap

OpenStudy (igreen):

Yes, and only one option has 87 in front of it..and which one is that? @AbbySmith12

OpenStudy (abbysmith12):

D

OpenStudy (anonymous):

srry bout not being able to help much.. :(

OpenStudy (igreen):

Yep, you got it, that's your answer.

OpenStudy (abbysmith12):

thanks so much

OpenStudy (anonymous):

yea good job @iGreen

OpenStudy (igreen):

No problem.

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