Question

can someone help me explain these questions

Answer 1

\[27. -2\sqrt{7x ^{2}}*\frac{ 1 }{ 3 } \sqrt{28x ^{3}}\]

Answer 2

\[33. (3\sqrt{2}-2\sqrt{5})(4\sqrt{2}+ 2\sqrt{5})\]

Answer 3

\[43. n \sqrt{2}=\sqrt{9-3n}\]

Answer 4

\[47. y=\sqrt{x+4}\]

Answer 5

please help explain it

Answer 6

@zepdrix

Answer 7

\[\Large\bf\sf \color{royalblue}{27)} -2\sqrt{7x ^{2}}\cdot\frac{1}{3}\sqrt{28x ^{3}}\]Multiplication is commutative, so we can multiply things in any order.
Let's bring the 1/3 to the front and multiply it with the -2.\[\Large\bf\sf \color{royalblue}{27)} -\frac{2}{3}\sqrt{7x ^{2}}\cdot\sqrt{28x ^{3}}\]Then we'll combine our square roots by multiplying the insides together,\[\Large\bf\sf \color{royalblue}{27)} -\frac{2}{3}\sqrt{7x^2\cdot 28x ^{3}}\]

Answer 8

From there we can multiply some stuff together under the root.
Following along so far?

Answer 9

yes

Answer 10

@zepdrix

Answer 11

So again, under the root we're multiplying so we can move stuff around.
We'll multiply the 7 and 28.
And then we'll multiply the x^2 by x^3.
What do the x's give you?

Answer 12

\[\Large\bf\sf x^2\cdot x^3\quad=\quad ?\]

Answer 13

\[x^{6}\]

Answer 14

No silly!
When we multiply terms of similar bases, we `add the exponents`.\[\Large\bf\sf x^2\cdot x^3\quad=\quad x^{2+3}\quad=\quad x^5\]

Answer 15

\[\Large\bf\sf \color{royalblue}{27)} -\frac{2}{3}\sqrt{7\cdot28x^5}\]

Answer 16

oo sorry

Answer 17

Multiplying the 7 and 28,
\[\Large\bf\sf \color{royalblue}{27)} -\frac{2}{3}\sqrt{196x^5}\]Now we need to ask ourselves, does 196 have any factors that are perfect squares?

Answer 18

Oh nevermind, 196 is itself a perfect square it seems! :)

Answer 19

ok

Answer 20

What's the square root of 196?

Answer 21

its 14

Answer 22

Ok good so we'll take the square root of 196,
\[\Large\bf\sf \color{royalblue}{27)} -\frac{2}{3}\cdot 14\sqrt{x^5}\]Then multiply the 14 by the -2/3,
do you understand how to do that?

Answer 23

no

Answer 24

You can think of \(\Large\bf\sf 14\) as \(\Large\bf\sf \dfrac{14}{1}\),

and then just do fraction multiplication,
\[\Large\bf\sf \color{royalblue}{27)} -\frac{2}{3}\cdot \frac{14}{1}\sqrt{x^5}\]
top with top,
bottom with bottom,\[\Large\bf\sf \color{royalblue}{27)} -\frac{2\cdot14}{3\cdot1}\sqrt{x^5}\]

Answer 25

ok

Answer 26

Read the following research paper excerpt and answer the question.

According to Mario Pei, slang is common to English as well as to foreign languages (80).

Answer 27

Write the equation of the piecewise function u0192 that is represented by its graph.

Answer 28

build the wall at the border, change me mind

Answer 29

Last three

Answer 30

what tools do I need to make someone dissapear?

Answer 31

https://prnt.sc/l7sij9

Answer 32

Help on second part

Answer 33

What is the value of x ?

Answer 34

if I digest flex seal will it provide a protective layer on my organs?

Answer 35

PLS HELP!!!
https://dlap.gradpoint.com/Resz/~0.hpA-mOMelFMyUA6.E8nsNCbP7Zj4DzTvgH2qOowctLoNnspM1VAi3Bx1-jg/7234256,D47/Assets/questions/quiz/precalculus/pca

Answer 36

which expressions are equivalent to u221a25d u00b7 d 1/3 ?

Answer 37

Write the equation of the piecewise function u0192 that is represented by its graph.

Answer 38

Orgo II Mini-Tutorial: Bayer-Villiger Oxidation

Answer 39

ud835udc53(ud835udc65) = ud835udc65^2 + 1, ud835udc54(ud835udc65) = u221aud835udc65.

Answer 40

How many mL of water are required to make up a 1.87M solution if you start with 0.

Answer 41

math help plz
An experiment consists of drawing 1 card from a standardu200b 52-card deck.

Answer 42

A. The speaker describes how, even now, he lies down by his beloved in her "sepulchre there by the sea.

Answer 43

Answer check

Answer 44

Billy is trying to convince Sam that all square roots are irrational. To support his argument, Billy points out that sqrt(2), sqrt(6), sqrt(7), and sqrt(15)

Answer 45

Part A

What is the main idea of this part of the poem?

A. Annabel Lee's kinsmen took her from the speaker because she was highborn.