exam Maths Puzzle Numerical Ability

A car traveled 280 miles at 55 mph.
About how many hours did it take for the car to reach its destination?

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I need help on this.
Page 238
Number 4



The tax increase is more than $7890.
Could someone help me factor this problem?
Factor the following polynomials.
4ux+20u+vx+5v
Thanks!