Radius of a wheel = 13 inch
= 1.08333 ft
circumference of a wheel = 2×pi×r^2
= 2 × (22/7) × 1.08333^2 ft
= 2 × (22/7) × 1.1736 ft
= (44/7)×1.1736 ft
= 51.6384/7 ft
= 7.3769142857 ft
distance covered in one minute = 37 × 60 ft/min
= 2220 ft/min
now, revolution per minute = 2220 / 7.3769142857
= 300.93884
therefore her wheels are making 300.93884 revolutions per minute
Domain is the set of numbers you can use for the equaiton
remember you can't divide by zero, or take the squaer root of a negtive number (we don't have sqrts in this quesiton so don't worry about last one)
so you can't divide by 0
domain =all real number except those that make divide by zero
where is that?
x-1=0
x=1
when x=1, we can't allw that
domain=all real numbers except 1
3(a + b) the answer to the question
You cannot combine any the terms because x and y are two different variables. that is the most simplified you can get.
The answer of the question is 75
