book Maths Puzzle Numerical Ability

How do I figure this out?

Amy's grades for each component of the course and the weight of each component for the course are:
Component Weight Gr

Read Solution (Total 0)

book Other Question

The wages of 5 newpaper carriers totaled $110 for 2 weeks work. How much will 3 carriers earn if they work for 3 weeks each at the same weekly rate? Solve for t and find the digit that equals a: [3(230+t)]^2=492,a04