exam Maths Puzzle Numerical Ability

i need some help with this please!!! i am getting confused here. true or false: the 2*2 identity matrix has no inverse? true or false? thanks

Read Solution (Total 0)

exam Other Question

Mugabee thought he was rich because he was paid $240 for a 40-hour week. The next week he received a 20 percent hourly raise, and in addition, he was allowed to work 60 hours. He really celebrated when he saw his paycheck. How much did he get paid? grade B syrup sells for $1.35/L less then grade A syrup.if 80L of grade B syrup is mixed with 40 L of Grade A syrup, the resulting mixture will be worth $1.85/L. what is the unit price for the two grades of syrup?