exam Maths Puzzle Numerical Ability

The school flagpole cast a shadow 15ft long. Mr. Hansen cast a shadow 4ft long. Mr. Hansen is 6ft tall. How tall is the flag pole.

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exam Other Question

write an equation for a function that has the shape of y=^4 but shifted left 2 units and up 3 units 3x+5y+6z=3
2x+3y+5z=1
-2x+7y-34z=-4

use Gauss-Jordan elimination method to find the inverse of the coefficient matrix.