Answer:
213
Step-by-step explanation:
The circumference of the wheel is given by
C=2πr=πd
Where d is diameter, r is radius and c is circumference
The number of revolutions N multiplied by circumference should yield the total distance
N*πd= Distance
Given distance of 20, 000 cm and diameter of 30 cm
30πN=20000
Making N the subject of formula
N=20000/(30π)=212.20659078919378102517835116335248271261
Rounded off, about 213 revolutions are required
The perfect square
can be expanded as follows:

So, we have to think of the term
as
, which implies
.
Thus, we have to add
, i.e. 16, to complete the perfect square:

Answer:
y = (constant variable x time) + independent variable
y = 60x + 30 ← Health Club B
y = 27x + 50 ← Health Club A
Step-by-step explanation:
I can't see the question at the bottom due to the covering but if you comment I can edit this and give a proper answer. Otherwise this is all I can give you.
Answer:
<em>a = </em><em>-21</em>
Step-by-step explanation:
<em>-22 x -21 = </em><em>462</em>