The answer is in the image
The solution is in the following image
y=2x+15
where y=Value of coin
x=Age in years
Value of coin after 19 years=2*19+15
=$53
Therefore, Value after 19 years=$53
The solution is given in the image below
Here,
tip=18%of $32
tip=(18/100)*32
=0.18*32
=$5.76
Total payment=32+5.76=$37.76
Salesperson will make 6% of 1800
=(6/100)*1800
=108
Salesperson will make $108 in $1800 sales
30% of 420 are first year students
first year students = (30/100 )*420
=126 students
Student who are not in first year = 420-126
=294 students
There are 6 outcomes 1,2,3,4,5,6
Total outcomes = 6
Outcomes when rolling a number is 4 or less = 1,2,3,4
Total outcome when rolling a number is 4 or less=4
Probability = required outcome/total outcome
=4/6
=2/3
Therefore probability = 2/3
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