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4/x=3/9    cross-multiplying, we get

36 = 3x     divide both sides by 3

12 = x

I am not a fan of them, but they are fluffy, cute (as my sister says, not me!), and have long hair, i think. I am not sure, so don't tell me that i like unicorns!!!!

7.8 x 10⁴

Only if you dry them properly.......low heat and mixed in with the "gentle" fabrics........

$$\sqrt2=1.414213562373095$$ But good try.

$${\frac{{\mathtt{12}}{\mathtt{\,\times\,}}{\mathtt{2}}}{{\mathtt{5}}}} = {\frac{{\mathtt{24}}}{{\mathtt{5}}}} = {\mathtt{4.8}}$$

$$4.8=4\frac{4}{5}$$

Complementary angles are two angles whose degree measurements add up to 90 degrees. The first angle would be (x + 14.4) and its complementary angle would be x.

Therefore, you would set up this problem as:

x + (x + 14.4) = 90

2x + 14.4 = 90

2x = 75.6

x = 37.8  (one angle)

And (x + 14.4) = 52.2 (other angle).

To check: $${\mathtt{37.8}}{\mathtt{\,\small\textbf+\,}}{\mathtt{52.2}} = {\mathtt{90}}$$

it would be 2.6732 X 10^-11, and no you do not.

its how many "decimal points" you move to the left or right

the exponent will be postive for large numbers and negative for small ones

$${\mathtt{2.673\: \!2}}{\mathtt{\,\times\,}}{{\mathtt{10}}}^{-{\mathtt{11}}}$$

We have our crack investigative staff looking into it at this very moment.......!!!!!

Originators will be prosecuted to the fullest extent of the law......  (if we can find any....)

Boring stuff that "you may need letter in in life" witch is a lie. Just saying. 

1/8y(5y+64)=1/4(20+2y)     multiply both sides by 8 to clear the fractions

y(5y + 64) = 2(20 + 2y)        distribute terms on both sides

5y² + 64y = 40 + 4y           subtract 40 + 4y from both sides

5y² + 60y - 40 = 0               see if we can factor

5(y²  + 12y -8) = 0                divide both sides by 5

y²  + 12y  - 8 = 0                 no factoring available..... using the on-site calculator, we have

$${{\mathtt{y}}}^{{\mathtt{2}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{12}}{\mathtt{\,\times\,}}{\mathtt{y}}{\mathtt{\,-\,}}{\mathtt{8}} = {\mathtt{0}} \Rightarrow \left\{ \begin{array}{l}{\mathtt{y}} = {\mathtt{\,-\,}}{\mathtt{2}}{\mathtt{\,\times\,}}{\sqrt{{\mathtt{11}}}}{\mathtt{\,-\,}}{\mathtt{6}}\\
{\mathtt{y}} = {\mathtt{2}}{\mathtt{\,\times\,}}{\sqrt{{\mathtt{11}}}}{\mathtt{\,-\,}}{\mathtt{6}}\\
\end{array} \right\} \Rightarrow \left\{ \begin{array}{l}{\mathtt{y}} = -{\mathtt{12.633\: \!249\: \!580\: \!710\: \!799\: \!7}}\\
{\mathtt{y}} = {\mathtt{0.633\: \!249\: \!580\: \!710\: \!799\: \!7}}\\
\end{array} \right\}$$

(3/7)m = 6    multiply by (7/3) on both sides..

(7/3)(3/7)m = 6(7/3)

m = 42/3  = 14      ....see how multiplying by the reciprocal "isolates"  "x"    ???

Let x be one angle...so 5x is the other ....and....

x + 5x = 180

6x = 180    divide by 6 on both sides

x = 30 and 5x = 5(30)  = 150

The abstract science of number, quantity, and space.

the answer is 0.375

Multiple places I looked were unfamiliar with the word exposant in English. What I got is a translation from French to exponent. If you did mean exponent, you'll have to be more specific. Do you mean any of these?

What is 900^2?

What is the square root of 900?

What is 1^900?

What is the prime factorization of 900?

If you did not mean exponent, please try to write out what you mean in mathematics. Otherwise, reply with one of the exponent choices above.

3/8 or 0.375

32/3 = 10 + 2/3     (he can only deliver 2 envelopes to the 11th class!!!)

6v+5≤9v-7    add 7 to both sides and subtract 6v from both sides

12 ≤ 3v         divide by 3 on both sides

4 ≤ v      or, if you prefer  v ≥ 4

I assume you might have....

cosΘ = 13.5/25    and you want to find theta  .....just use the cosine inverse.....so we have

cos^-1(13.5/25) = about 57.3 degrees   (note that this could also be a 4th quadrant angle, as well !!)

We would have infinite solutions here....for example.....

26*2 = 52

13*4 = 52

52*1 = 52

.......etc.  ...........

8=16+8n     subtract 16 from both sides

-8 = 8n        divide by 8 on both sides

-1 = n

(5/2) / (-8/5)        just invert the second fraction and change to  multiplication....so we have

(5/2) * (5/-8)   = 25/-16  

8x + 6 < 54   subtract 6 from both sides

8x < 48      divide both sides by 8

x < 6