4x=x-1+19 -> 4x=x+18 (then you minus 1x from both sides) -> 3x=18; x=6
To work this out you will need to find the lowest common factor of 4 and 10 since that is when you get there product and discount, therefore the lcm is 20, and therefore that is your answer (20)!
Complementary angles are those angles whose sum is 90 degree.
The measurement of two complementary angles are
There sum have to be 90 degree. That is
Combining like terms ,
Moving 20 to right side
Dividing both sides by 5
So the measurement of the angles are
You are to calculate the # of students, based upon the starting volume of juice and the amount each student receives.
22 1/2 cups
This # of students is equal to ------------------------------
[1 1/4 cup / student ]
and this could be found easily by dividing 22.5 by 1.25: 18. There are 18 students.
