SparklingWater2

-7/2(12x+6)<8-5x

-84x/2-42/2<8-5x

-42x-21<8-5x

-29<37x

$\boxed{x>-\frac{29}{37}}$

multiplying by 2: 1248

dividing by 2: 8421

multiplying or dividing any more will go into double digits, so only $\boxed{2}$(unless I made a mistake).

HIJ+JHI+IJH=x+6+3x+18+180-(7x-15)=-3x+219=180

3x=219-180=39

x=13

JHI=3x+18=39+18=$\boxed{57}$

uuuuuuuhhhhhh... this is very confusing, yet intriguing, and off-topic xD

if we have 20 less than 4 times a number, we would be subtracting 20 from the 4 times the number. therefore, the only one that represents 20 less than 4 times a number is $\boxed{4x-20}$

The surface area of a sphere is 4$\pi$r$^2$, and the diameter is 8, so the radius is 4, so we plug in 4 for r, and we get:

$4\pi\cdot16=\boxed{64\pi}$

the answer is $\boxed{B}$ because 0.85+0.15=1, and subtracting -1/3 is much easier that way.

parallelogram area: height x base

9.6 x 4.9 = $\boxed{47.04}$

15+15/2=22.5

22.5+22.5$\cdot$7/100=24.075 rounded to $\boxed{\$24.08}$ or $\boxed{B}$

to do this, all we have to know is the divisible by 7 trick and the divisible by 9 trick. the divisible by 7 trick is where you take away the last digit then multiply it by two, then subtract that number from the original number, and repeat. the divisible by 9 trick is if the digits sum up to a mulitple of 9. now, you can just go with trial and error, and the lowest repunit divisible by both 21 and 9 is 111,111,111,111,111,111, which contains $\boxed{18}$ digits.