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Helen [10]
2 years ago
5

HELP!!!!!!!!! THIS IS DUE TOMMOROW!!!!!

Mathematics
1 answer:
S_A_V [24]2 years ago
7 0

Answer:

check 2nd and last box. :))

Step-by-step explanation:

Ok, so I would work out the Area, then rule out a few of these options.

First of all, if you look closely, you can see that instead of an l(x), it's an l(w), which means that what l(w) equals, is a product of whatever l(x) is with w serving as its x (if that makes sense lol). so, we need to divide by w to figure out what l(x) is.

<u>3x³+2x²-4x+5</u>  <u>(3x³+5)+(2x²-4)</u> <u>(3x³+5)+2(x+2)(x-2)</u><difference of two squares

      x+2         ⇒      x+2          ⇒         x+2                  so then the (x+2)'s cancel

and you're left with 3x³+5+2x-4 ⇒ 3x³+2x+1 which is l(x). Now you're ready to see what A(x) equals.

x(3x³+2x+1)+2(3x³+2x+1) =

[(3x^4)+2x²+x]+(6x³+4x+2) =

(3x^4)+6x³+2x²+5x+2=A(x)

So now you can rule out the answers. <u>Number one</u> can be done mentally, and it's <u>not correct</u>. <em><u>Number 2 is definitely true</u></em>. Number three we need to work out.

<u>(3x^4)+6x³+2x²+5x+2</u>     <u>[(3x^4)+6x³]</u> (the rest doesn't matter)⇒ <u>3x³</u><u>(x+2)</u>

             x+2                ⇒                                                                    x+2

So then you're left with 3x³+2x²+5x+2 which is<em> not</em> equal to l(x), so the third option is false and ruled out. The <u>fourth one</u> you can just look at A(x) and conclude <u>it's false</u>, and the <u>third one is very obviously true</u>.

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0.14m= how many cm. get it right please
givi [52]
Here, I'll show you an EASY conversion acronym:
Kangaroos, Hopping Down Mountains Drinking Chocolate Milk:
That is KHDMDCM.
Now, here's what they ACTUALLY stand for:
Kilo, (kilometers, kilograms, etc.), Hecto, (hectograms, hectometers, etc.), Deca, (decameters, decagrams, etc.), M stands for THREE things, Meters, liters, and grams, Deci, (decimeters, decigrams, etc.), Centi, (centimeters, centigrams, etc.), and Milli, (millimeters, milligrams, etc.).
Now, you look at the diagram I have provided below:
You put 0.14 under Meters, liters, and grams, because it's 0.14 meters.
Now, whenever you move RIGHT, you move the decimal RIGHT every time you move. If there is a WHOLE number, (like 14), you add a ZERO to the number, so when you would move 14 to the RIGHT, it would become 140. Now when you go LEFT, you move the decimal to the LEFT, and if there are ANY ZEROS, you would take them out.
Now you might get a little confused when moving left;
Look, EVERY NUMBER has a decimal, like the number 14 itself.
14 has an imaginary decimal, which is 14.0. EVERY NUMBER HAS THAT. So, if you are moving LEFT, and you DON'T have any zeros, you would simply have 14 into 1.4.
So, with that out of the way, let's start figuring out how many centimeters 0.14 is equivalent to.
So we move to the RIGHT, because the centimeters is on the RIGHT, and now we move the decimal to the right.
Now it would be 01.4, but it's the same as 1.4, so we'll just put 1.4 under deci.
Now we have 1.4 DECIMETERS, but not quite yet centimeters.
We must keep moving to the right.
Once we move that decimal AGAIN, it is now 14. 
WOO HOO! WE FIGURED IT OUT!
So 0.14m = 14 cm.
You saw how we figured that out? You could use this technique on ANY conversion problem like this in the future!
I hope I helped! =D

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