Question

http://assets.openstudy.com/updates/attachments/4ff38e1ce4b01c7be8c73ad6-knicksfan4life-1341361716957-2011entering_11th_grade_math.pdf

please look at number 18

Answer 1

ok so the you can take away eight from both sides

Answer 2

Okay. If you have this equation:
\[8+\sqrt{k}=15\]
You can subtract 8 from both of the sides, so you have
\[\sqrt{k}=7\]
And now you have to square both sides.
\[\sqrt{k}^{2}=k=7^{2}=?\]

Answer 3

So what's 7 squared?

Answer 4

49

Answer 5

Yep :)

Answer 6

\[8 + \sqrt k = 15\]
take 8 from bothsides
\[\sqrt k=15-8\]

Answer 7

sooooo.

Answer 8

so that means 7 is the square root of 49

Answer 9

So k=49

Answer 10

good stuff thanks

Answer 11

No problem

Answer 12

B