Easy Algebra homework? Help please?

Question

It's a little review, but I haven't had Algebra for about 2 years now so I've forgotten even the most simplest of things. It's just 1-3 problems that I couldn't figure out after a while T_T.

Make into perfect square:

4x^2-_____ +25 <---I don't get that one.

8A^2B^3C^4 divided by 2AB^2C^2 <--- Don't get that either.

Find four points on the graph of 2y+3x=8

(3/4)^0= ???

And lastly, x=y+3

3x+5y=29

x=??? y=??? Point___???

If not all of them at least 1 or two problems because I really need help. Thank you so much!

FYI: ^2, etc means power to

(3/4)^-2= -9/16, right?

Answer 1

1 by taking the sq. root of 4x^2 nd 25, u get 2x and 5,

2x(5)(2) = 20x

#2   8/2 = 4

      A^2/A = A

     B^3/B^2 = B

     C^4/C^2 = C^2

therefore = 4ABC^2

#4 (3/4)^0 = 1

#5 substitution

3(y+3)+5y = 29

3y+9+5y= 29

8y=20

y = 5/2

x =11/2

and btw, (3/4)^-2 isn&#039;t -9/16

it&#039;s 16/9

a number raised to the negative 1 will get its reciprocal

so, it becomes (4/3)^2 = 16/9