exam Maths Puzzle Numerical Ability

What is the slope of a line that is perpendicular to the line that passes through the points (4,7) and (9,3)?

A. -4/5 B. -5/4 C. 4/5 D. 5/4

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exam Other Question

An architect designs a house that is 12 m wide. The rafters holding up the roof are equal in length and meet at an angle of 70 degrees. The rafters extend 0.3 m beyond the supporting wall. How long are the rafters? write an equation to solve this problem. the service pool built a pool that was 100ft by 60ft wide. they want to built a sidewalk around the pool and had 450ft of fence. what is the maximum width that the sidewalk can be?