Simplify each expression, justify each step. -8+9w+(-23), 6/5*(-10*8), (4/3*0)*(-20), 53+(-12)+(-4t), 6+3 /9

Somone me i want to know what 18 hours out of 24 hours in a fraction

Aschool allots ? 1500 to spend on a trip to the theatre. theatre tickets have a regular cost of ? 55 each and are on offer for 1 5 off. a train ticket for the day will cost ? 12 each. if 2 teachers and the maximum number of students attend, how much money will the school have left over?

Use pascal's triangle to find the missing values. x4 - 4xb + 6x2 - ax + 1