Question

Help! Super easy!

Answer 1

i like easy questions !

Answer 2

it is pretty easy right? use pythangoras to get the missing side

Answer 3

\[y^2+84^2=85^2\] solve for \(y\)

Answer 4

you good from there or you need steps?

Answer 5

So what do I do with the number? Do I add them, subtract them or divide?

Answer 6

order of operations

Answer 7

ok lets take the steps

Answer 8

you have one number on one side of the equals side what do you do to get them on the other?

Answer 9

you can do the arithmetic at any time
first, last, whatever
lets do it first

Answer 10

\[y^2+84^2=85^2\]square each (i used a calculator) to get
\[y^2+7056=7225\]

Answer 11

now two steps to find \(y\) first subtract \(7056\) from both sides
\[y^2=7225-7056\\
y^2=169\]

Answer 12

then take the square root of \(169\) to find \(y\)\[y=\sqrt{169}=13\]

Answer 13

if you have to do a lot of these, there is another way you might get used to

Answer 14

go right to
\[y=\sqrt{85^2-84^2}\] and plug that (carefully) in to a calculator
i use this
http://www.wolframalpha.com/input/?i=sqrt%2885^2-84^2%29