AzizHusain

19 + 2[6-(6-4)2]

19 + 2[6 - 2*2] <--Parentheses first

19 + 2[6 - 4] <--- Multiply next in brackets

19 + 2[2]

19 + 4

23.

4(r - 20) + 3r

4(15 - 20) + 3(15)

4(-5) + 15

-20 + 15

-5.

Note that this a difference of squares:

where a = q and b = 1 (a^2 - b^2)

Therefore, our answer is q^2 - 1.

Por cada 1 a 3 puntos, como se cual usar? 

Si 1 punto adicional --> 113 - 46 = 67 --> 67*100 = $6700 + $4200 = $10,900.

Si 2 puntos adicionales --> 113 - 46 = 67 --> 67/2 = 33.5 --> 33.5*100 = $3350 + $4200 = ....

Si 3 puntos adicionales --> 113 - 46 = 67 --> 67/3 = ........................

?

Necesitas usar el "2nd" key primero en la calculadora. Entonces, usas el "atan" key. 

Tambien, puedes escribir atan(#) cuando # es un numero o otra cosa.

Are you trying to apply this to a function such as f(x) = x^2 + 1?

If we plug in x = 1 and x = -1, we obtain a value of 2 (two different inputs yielding the same output).

5.5 --> Note that if you multiply by 10, you get 55. To get back 5.5, you have to divide by 10. 

So, 5.5 --> 55/10.

You can simplify this by dividing both the numerator and denominator by 5:

55/10 --> 11/2.

Multiply the numerator by 2 since 10*2 = 20 --> 3*2 = 6 --> 6/20.

130000*0.0057 = 741.

11.045

First, we can take out the 11 leaving 0.045.

Now, if you multiply 0.045 by 1000, you get 45...so 45/1000

Along with the 11, we have $$11\frac{45}{1000}$$.

We can reduce this by dividing both the numerator and denominator of 45/1000 by 5.

$$\mathbf{11\frac{9}{200}.}$$