jimkey17

If a what?

Wrong

We have (4+1)!/4!=5 so we have 5 ways to distribute 4 identical balls among 4 identical boxes

The circle has area 64pi and that means angle AOB is 60 degrees since it's equalateral so we have 32pi/3 for the sector and for the triangle is 8*4sqrt3=32sqrt3 we then divide by 2 to get 16sqrt3 we subtract to get 32pi/3-16sqrt3 so we have $\boxed{(B)\dfrac{32\pi}3-16\sqrt3}$

Graph below:

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We can use algebra s=speed and l=length (500+l)/s=20, (1900-l)/s=30 we have that s=48 and l=460 by Adding the equations in order to solve for the first variable. Then we plug this value into the other equations in order to solve for the remaining variables. 

so we have the $\text{speed}=48,\text{ and }\boxed{\text{length of the train}=460m}$

we do 5.70*25.5=145.35(total price) and we can use algebra x+y=25.5(weight) and (2.20)x+(7.30)y=145.35 we have x+y=25.5 and we subtract y from both sides to get x=25.5-y then we substitute x with 25.5-y in (2.2)x+(7.3)y=145.35 which becomes 2.2(−y+25.5)+(7.3)y=145.35. We simplify both sides of the equation to get 5.1y+56.1=145.35 and subtract 56.1 to get 5.1y=89.25 so we get that y=17.5 and x=22.5-17.5=8 

and we have $\boxed{x=8}\text{ and } \boxed{y=17.5}$

Um a fraction is a numerical quantity that is not a whole number 

EXAMPLE: 1/3,5/7, 4 5/7, 86/21