MATH115 FINAL EXAM

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Find A X B.

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Find  $\left|C\right|$  

• -33

• -23

• 20

• 15

Find  $A^{-1}$  

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Hence, solve the simultaneous equation using the matrix method
 $2x-y=2$  
 $x+2y=11$  

• x = 3 & y = 4

• x = 2 & y = 5

• x = -3 & y = 4

• x = -3 & y = -4

What is the initial volume of the water in the tank?

• 210 liters

• 3.5 liters

• 206.5 liters

• 0 liters

Write for the rate at which the water is leaking.

• 210 liters/hr

• -3.5 liters/hr

• 10 liters/hr

• 1 liter/hr

How much water remains in the tank after 2 days?

• 42 liters

• 203 liters

• 100 liters

• 90 liters

Calculate how long it will take all of the water to leak from the tank.

• 60 hours

• 40 hours

• 50 hours

• 208 hours