Question

Help. Picture attached.

Answer 1

I need help with part c.

Answer 2

yep, that's what I did but I got the wrong answer...

Answer 3

\[h^2+(6x)^2=6.5^2\]

\[h=\sqrt{6.5^2-(6x)^2}\]

Answer 4

it's 6.5x**

Answer 5

oh yeah

\[\color{red}*\\ h^2+(6x)^2=(6.5x)^2\]

\[h=\sqrt{(6.5x)^2-(6x)^2}\]

Answer 6

yep, that's what I got.

Answer 7

now square the terms in the brackets ,

and factor out x^2

Answer 8

ok, I know where I went wrong.
I did 6.5 x 6.5 =36.25 and it should be 42.25

Answer 9

I hate no calculator questions!! :(

Answer 10

how do u figure out 6.5 x 6.5 quickly by hand?

Answer 11

besides normal multiplying.

Answer 12

and one more question how do u solve Sqrt(6.25x^2) by hand? how would u know the Sqrt of 6.25?

Answer 13

\[6.5^2=6^2+2(6)(0.5)+0.5^2\]
\[\qquad=36+6+0.25\]

Answer 14

ok, got it, thanks and can u help me with my other question?