The stopping distance (d) of a car varies directly as the square of its speed (v). If a car traveling 40 mph requires 150 ft. to stop, find the stopping distance for a car traveling 50 mph.

What Variation is this? And write the equation using only variables.
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The triangles are similar. what is the value of x? show your work.

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?

(c) the diagram shows the first three shapes of a matchsticks arrangement. first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.