Question

please help me
√a-7 -5=0
Step 1: Isolate the radical by adding 5 to both sides. Step 2: Square both sides and solve for a.

Answer 1

Ok, so the first thing you are going to do is get rid of the 5. :) It doesn't belong with the "a" numbers and letters don't get along >:D
So add it to each side.

Answer 2

um is the -7 also under the radical?

Answer 3

yes

Answer 4

Oh ok :)

Answer 5

So when you add the 5 to both sides, you will end up with:
\[\sqrt{a-7}=5\]

Answer 6

Now that we have that, our next step is to get rid of the radical......now how do you think we do that?

Answer 7

square both sides rt

Answer 8

Yep :)

Answer 9

So what would you get?

Answer 10

thats the prob... we are getting a=32 so im not sure what im doing wrong

Answer 11

Ok, so when you square it, you should get:
a-7=25
then to get rid of the 7 you add it to both sides.
Then you get:
a=32
hmmmmm I'm pretty sure you're right?

Answer 12

What are the answer choices?

Answer 13

it doesnt have choices i just have to place the answer but it marked it wrong

Answer 14

:( I'm pretty sure you're right..... i think you should email your teacher, maybe the computer system was wrong

Answer 15

thinks so i have another one do you mine checking that one also

Answer 16

sure

Answer 17

Find all real solutions of the equation. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION.)
\[\sqrt[4]{8z+9}=3\]

Answer 18

brb

Answer 19

k

Answer 20

i'm sorry, i'm not sure about how to solve this one :'( sorry

Answer 21

k thank so much