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Mathematics 13 Online
OpenStudy (lilai3):

Please help!!! Please help! It would be greatly appreciated!!!!! Angles A and B are complementary. If angle A equals 3x-8 and angle B equals 5x +10, what is the measure of each angle?

OpenStudy (anonymous):

Don't make this hard. Complementary angles add to 90 degrees. So that gives us (for brevity, I will use the name of the angle to represent its measure):\[A+B=90=(3x-8)+(5x +10) \implies 8x=88 \implies x=11 \]\[\implies A=25,~B=65\]

OpenStudy (anonymous):

You get that?

OpenStudy (lilai3):

like...oh.... i get it now...but, it certainly DID look hard tho.. but ur explaining made clear sense...so yeah...i'm with you. thanks a bundle!!!!

OpenStudy (anonymous):

No sweat. Do math every day.

OpenStudy (lilai3):

:P i read everyday, and my prents are like "Get that book outta ur face! R u ever going to take a picture with that? cuz if ya do, i'm going to burn all your books!" they threaten me like i'm some scholar and they're like Qin ShiHuangDi... and stuff... they tell me to do math O.o

OpenStudy (anonymous):

It only looks hard if you try to do the whole thing at once. Eat the elephant one bite at a time. In this case, it's definition (complementary angles), substitution, solution (for x), and substitution again (to solve for A and B). Little bits at a time get the job done.

OpenStudy (anonymous):

Balance in everything. You need to read every day as well. And don't forget to have fun.

OpenStudy (lilai3):

okay. thanks for tghe advice.i have a question: is that actually like a real phrase? eat an elephant? like is it one of those "cat got your tongue" stuff?

OpenStudy (anonymous):

Sort of. I ask my students, "How do you eat an elephant?" The answer is, "One bite at a time." The point is, you have to break the problem down into parts to make it solvable.

OpenStudy (lilai3):

:O *goggly eyes* what? ur a teacher? *whimpering puppy eyes* what? you never told me that _back to the future_ so every time you see a hard problem, you: 1 don't sweat 2 break down the problem bit by bit, piece by piece 3 you solved it!

OpenStudy (lilai3):

...right?..

OpenStudy (anonymous):

Pretty close. It would seem you have been paying attention!!

OpenStudy (lilai3):

trust me *laughing* i have (:3)

OpenStudy (anonymous):

If you are getting stuck, a pretty good place to start is "Well, what DO I know?"

OpenStudy (anonymous):

In the case of this problem, I'm pretty sure you know what sum you get when you add the measures of a pair of complimentary angles. After that, a little substitution gives a one-variable linear equation, and that gives the rest of the problem.

OpenStudy (lilai3):

90 degrees right?

OpenStudy (anonymous):

Yep. The vocabulary (definition of complementary angles) is the key to the whole problem.

OpenStudy (lilai3):

anyway, thank you so very much! i greatly appreciate it! come to openstudy more often! ;)

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