Question

Can someone check my Algebra 2 hw? I give medals!

Answer 1

x^7+8=28

Answer 2

I got x=1.53

Answer 3

\[1.534127404634391^7=20.\]

Answer 4

yes, thank you! would you mind checking a couple more?

Answer 5

go ahead.

Answer 6

sqrt(2x+30) = x+3

Answer 7

I got x=-21

Answer 8

Try x = 3

Answer 9

I did
(sqrt(2x+30))^2=(x+3)^2
2x+30=x+3^2
-x -x
1x+30=3^2
x+30=9
-30 -30
x=-21

Can you tell me where I went wrong?

Answer 10

it looks like you squared (x+3) incorrectly

Here is how you should square it

(x+3)^2 = (x+3)*(x+3)

(x+3)^2 = x*(x+3) + 3*(x+3)

(x+3)^2 = x*x + x*3 + 3*x + 3*3

(x+3)^2 = x^2 + 3x + 3x + 9

(x+3)^2 = x^2 + 6x + 9

Answer 11

okay, thank you!