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whats 2/3 times 2/3

How about 2/3 x 2/3=4/9. Is that really difficult?

The is no answer:    it is undefined

The value in the brackets must be between -1 and 1 inclusive.

This will look like:  $${\frac{\left({\frac{{\mathtt{1}}}{{\mathtt{6}}}}\right)}{{\mathtt{140}}}}$$ , which can also be:  $$\left({\frac{{\mathtt{1}}}{{\mathtt{6}}}}\right){\mathtt{\,\times\,}}\left({\frac{{\mathtt{1}}}{{\mathtt{140}}}}\right)$$, which turns into:  $${\frac{{\mathtt{1}}}{\left({\mathtt{6}}{\mathtt{\,\times\,}}{\mathtt{140}}\right)}}$$, you can do the math from there.

How do i enter secent squared into the calculator

Just use 1/cosine. It's the same thing.

I don't know why the first answer contains an 'h'.  What that is saying is that you should plug in '-3t' for each 't' you see in the problem so:  h(-3t) = -2(-3t) + 2

Take the average of the x's and the average of the y's (you will get a fraction for the y's), then combine those numbers into an ordered pair.

A particular star is 5.2*10^18 meters away from Earth and has a luminosity of 8.9*10^29 watts. Ignoring the effects of the atmosphere, what is the brightness of the star, in watts per square meter, as observed from earth?

Brightness=8.9*10^29 / 4 x Pi x (5.2*10^18)^2

=2.619 x 10^-9 W/M^2

h(t) = -2t+2 , Find h (-3t)

Assuming I understand you

Then your answer is:

-3 h t

(12.83 x 45.2) + 1238472947.555 =   1238473527.47

what is the slope of 6+9y=7x?

The slope=7/9=.77777777777...........etc.

-54 sorry^

-49

what is tan?

"tan" stands for tangent=sine/cosine

8.6 degrees converted to dms

=8d, 36m, 0s

Find the equivalent expression to the complex number (1+i)23+(1−i)^2 3.

Do you mean (1+i23) + (1-i23)????????????

If that's what you meant, then the answer is=2

5 * 6 is 30. 30 + 4 = 34. 34 - 2 = 32

A child’s sandbox is 1.5 m wide, 1.5 m long and 75 cm deep. If there are on average 55 grains of sand per mm3 , how many grains of sand are there in the sandbox

Convert the sides to mm,

1.5 x1000=1500mm

75cm x10=750

1500 x1500 x 750=1,687,500,000 mm^3 (This is the volume of the box in cubic mm)

Then 1,687,500,000 x55=92,812,500,000 grains of sand in the box. Phew!!!!

How do I make 9 using only the numbers 2 0 4 8 ?

BRILLIANT gino3141!!!!!!!!. IF these kids have been taught the concept of any integer to the zeroth power=1

thank you both so much!

9+2(5x-10)=6x+1

x=3

9+2(5x-10)=6x+1

9 +10x-20=6x+1

10x-6x=+1-9+20

4x=21-9=12

x=12/4 or x=3

How about:  2 x 4  +  8⁰ ?

This is:  8 + 1 =  9

How do I make 9 using only the numbers 2 0 4 8 ?

Well maybe you CAN!!!!!!!

How about this: square this whole thing (24/8)=3^2=9? If your teacher is allowed to take square roots, then we should be allowed to do the opposite!!. What do think young person?

YES absolutely

Thinks about it

$$\\\frac{6}{3}=6\div 3\\\\\\
\frac{5}{15}=5\div 15\\\\\\$$

The division sign even looks like a fraction.  

See it has the line in the middle and the two dots represent the two numbers on each side  :)