X=time of the third person it would take to fill the pool
We can suggest this equation:
6[(1/20) + (1/15) +(1/x)]=1
6[(3x+4x+60)/60x]=1
(7x+60)/10x=1
7x+60=10x
7x-10x=-60
-3x=-60
x=-60/-3
x=20
Answer: the third person alone would fill the pool in 20 hours .
The sum of the measures of the interior angles of a polygon of n sides is
180(n - 2)
If the polygon is regular, all angles are congruent, and each angle measures
[180(n - 2)]/n
Set the measure of one angle equal to 140, and solve for n, the number of sides.
[180(n - 2)]/n = 140
180(n - 2) = 140n
180n - 360 = 140n
40n = 360
n = 9
The number of sides is 9.
Answer:
She would want to leave a 20% tip on the original $100. This means that the amount that she would leave as tip is
20/100 × 100 = 0.2 × 100 = $20.
Therefore, the total cost of Dakota's meal including the tax and the tip would be
100 + 13 + 20 = $133
Step-by-step explanation:
Answer:
m^2
Step-by-step explanation:
area of square=side^2=m^2
