SparklingWater2

Assuming you mean when Ben takes 28 from Amy they have the same amount of money:

2a/5=3b/4

8a=15b

b+28=A-28

a=b+56

a=15b/8

15b/8=b+56

15b=8b+448

7b=448

b=64

64+56=$\boxed{\$120}$

LOL

I got something complicated as well... I thought I got it incorrect. i actually got the same answer as you, so nothing's wrong... I think.

The only way it can equal -n is if x itself is negative. we can expand x(x+5) into x^2+5x=-n. if -n has to be an integer, then so does x.we can count all the possible ways:

x=-1
x^2+5x=-4

x=-2
x^2+5x=-6

x=-3
x^2+5x=-6
x=-4
x^2+5x=-4

x=-5

x^2+5x=0

from this point on, there will be no possible solutions.

so the only numbers that has real solutions that any x(x+5)=-n is n=4 or n=6, which is 2/10, so the answer is 8/10=$\boxed{\dfrac45}$

$100\cdot(x-4)+10\cdot{x}=100x-400+10x=700$

$110x=1100$

$x=10$

$10+(10-4)=\boxed{16}$

2x2x6=24

total amount of paint = 24

4$\pi$r$^2$=surface of sphere

2$\pi$r$^2$+$\pi$r$^2$=surface of hemisphere=24

$\pi$r$^2$=8

r$^2$=$\dfrac{8}{\pi}$

r=$\boxed{\frac{2\sqrt2}{\sqrt{\pi}}}$

Hmm... you could be right...

The largest possible difference is 12x8-1x20=96-20=76, not 4x20-2x8=64, which is less than 76.

$12x+14y\ge1200$

we can think of this as a timeline, where our point is x units away from 12:00, and 99 units the other direction, there is a point 2x units away from 8:00

this turns into an equation:3x+99=240 we will just solve for x:

3x=240-99=141

x=$\boxed{47}$minutes away from 12 P.M.