exam Maths Puzzle Numerical Ability

Solve this proportion:
Solve for X:
x-3/x = 4/7

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exam Other Question

x for x < 6
6 for x > 6

What is f(x) if f(x) =

a. The difference quotient
b. An indeterminate function
c. A piecewise function
d. A step function avg speed to car 1 = 55 mph
avg speed of car 2 = 70 mph
time elapsed between start of car 1 and start of car 2 = 4 minutes
how long before cars2 overtakes car 1?