First calculate the percentage of math.
100-23-30-15-12
=20%
then 150x20% for the math
=30 so there are 30 students chose math.
There would be 35 rulers.
In order to solve this, use cross multiplication.
6/10 = 21/x -----> cross multiply
10*21 = 6*x
210 = 6x
35 = x
The unit Circle is a platform for describling all the possible angle measures from 360 degrees all negative of those angles plus all the multiplies of the positive and negative angles from negative infinity to postive infinity hope this helps you
6 hours and 13 minutes
because when you add it that is what you get
message me and i will explain more
