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You simply multiply straight across - 

( 4 * (pi) * 147) / 3 

Which gives you the answer in picometers, then convert from picometers to meters. 

I already found the answer....

on another math forum...

the answer is −9a⁴+18a²−5

You need to FOIL to solve this problem. 

(3a² * -3a²) + (3a² * 5) + (-1 * -3a²) + (-1 * 5)

Then reduce the answer. 

V = -18

You multiply both sides by the divisor to solve for V

(6 3/4) = 6.75

twenty seven thirty sixths = 27/36 = 0.75

6.75 (plus) 0.75 = 7.50

So let's say that at the moment the girl has read 9 pages (just like you have stated). In order to figure out the answer, you would find the percent (20%), then you would see how many pages she has read at the moment (9). Now that you know how many she has read in 0.20 of the book, you can figure out that the rest of the 0.80 has to be 4 more of the 0.20. Multiply the 9 by 4 (since 4 0.20s have to be added to equal the 0.80) and then you get 36. Add 36 to 9 and you get 45. The girl in the question that you have asked has 45 pages in her book, meaning that she still has to read 36 to reach the end of her book.

use the slash (/)

yes you can

f(x) = 5x-15   →    y  = 5x-15

y intercept....let x  = 0    → y =   5(0) - 15   → y =  - 15

x intercept....let y  = 0   → 0 =   5x - 15  

add 15 to both sides  → 15 =  5x

divide both sides by 5  →  3  = x

I think you convert 

9% into a decimal, .09

.09 x 630 = 56.7

100% = 1, so 9% of 1 = .09

630 * .09 = x

7x=3y+15  rearrange as    7x - 3y  = 15

3x-2y=15

Multiply the first equation by  2 and the second by  -3

14x -  6y = 30

 -9x + 6y = -45        add these giving

5x  = - 15       divide both sides by 5

x  = -3

And using 

7x = 3y+15   → 7(-3) = 3y + 15 →  - 21 =  3y + 15  → -21 - 15  =  3y  → - 36  = 3y → -12  = y

Here's one possibility :

.05 ( x + 4)  + .10(x)  = 1.25    ......where x is the number of dimes

72 / 25  =  [ 2*25 + 22] / 25   =  2*25 / 25  + 22 / 25   =  2 + 22/ 25

omg why did you say that hannah