exam Maths Puzzle Numerical Ability

Science and medicine. A bus leaves a station at 1 P.M., traveling west at an average
rate of 44 mi/h. One hour later a second bus leaves the same station, traveling
east at a rat

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exam Other Question

Each of two congruent sides of a isosceles triangle is 8in less than twice the base. The perimeter of the triangle is 74in What is the length of the base? Factor completely:
b^2 - ab - 6a^2

Would the answer be:

(b-6a)(b+a)?? Thank you