# Math Ms. Sue

posted by Maya

[(1/4)^-3 divide sign (1/4)^2]^-2

I got (1/4)^10 but I got it wrong

(3^1/2)^3
_______ I got 1/216
9

(-56r^2)divide sign (-7r^2)= I got 8r

x(y)(x)(2y)

(12) (10xy^3) (3x^2y^2) (5x) (2y)

simplify sqaure root of 160000
simplify sqaure root of 0.04
simplify 3 * square root 81
simplify square root of 900
simplify square root of 0.0025simplify [(a^2bc^4)(ab^3c^2)]^2
___________________
(b^2c^5)^3
what is 4^-5/2 expressed as a radical with positive exponents

Thank you so much

1. Reiny

[(1/4)^-3 ÷ (1/4)^2]^-2

inside the square brackets we are dividing powers with the same base, so keep the base and subtract the exponents

= [ (1/4)^(-3 -2) ]^2
= [(1/4)^-5]^2
= (1/4)^-10
= 4^10

(3^1/2)^3
_______
9

= 3^(3/2) / 3^2
= 3^(3/2-2)
= 3^(-1/2) = 1/3^(1/2) or 1/√3

(-56r^2) ÷ (-7r^2)
= (-56r^2)/(-7r^2)
= 8
How did you get 8r, there is an r^2 on top and r^2 at the bottom so they divide out to get 1

For the rest of the questions, I can't tell where one ends and the next one begins

for all the questions beginning with "simplify", did you not notice that in each case you are taking the square root of a perfect square ?
e.g.
simplify 3√81 = 3(9) = 27
etc

## Similar Questions

1. ### Math

Add one to a number, then double the sum, and you get 56. how do i solve it and write it as a equation (x+1)*2=56 1. divide both sides by 2 2. subtract 1 from both sides you get x=27 For all of these questions just remember that when …
2. ### Algebra

I am having trouble with -4less than or equal to -3x-13 less than or equal to 26 -4 < -3x-13 < 26 Add 13 to all three parts of the inequality. 9 < 3x < 39 Divide all three parts by 3. 3 < x < 13 The < signs should …
3. ### algebra

I cant get this one nither I tried like 4 times to get right answer. 5x+12-3x=-2x-13-x x=-5 5x+12-3x=-2x-13-x First, let's get the unknowns on one side of the equation and the knowns on the other side. 5x - 3x + 2x + x = -12 - 13 5 …
4. ### Math

You are about to factor a quadratic equation involving some x_'s, some x'x and a plain number. You see that the sign in front of the x's is negative, and the sign in front of the plain number is positive. This tells you that when you …
5. ### Math (Algebra)

Solve using the multiplication principle -7x <_ 35 the sign is an inequality equal greater or lesser than sign would I substitute the sign for an equal sign and then divide 35 by -7 x=-5 -7 x -5= 35 how would I write the solution …
6. ### math

We are learning inequalities and I just did some homework but the teacher returned it saying I did some of them wrong. 1. -2x - 10 < 2 2. -2x + 15 < 17 I didn't flip the inequality sign when I divided by (-2). But why do we always …