54+x=12+3x
X=21 =number of classes
Total amount she will pay is $75
Set up ratios of height / shadow length:
8/6 = x/100
Cross multiply
6x = 800
Divide both sides by 6
X = 133.33 feet
The tower is 133.3 feet
I think b I might be wrong
Cross multiply
18 / X = 2.4 / 28
so
18 * 28 = X (2.4)
and that becomes
504 = X * 2.4
then divide by 2.4
X = 210
<span> 5 1/3a - 2 2/3
Have a wonderful day</span>
