exam Maths Puzzle Numerical Ability

Equation of change: For the equation of change
df over dx=7f-14, determine whether f is increasing or decreasing when f=1.

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exam Other Question

a) solve equation y = -16t + (v*t*sin(theta))+ h for t in terms of y, v, h, and theta.
b) use result from a) to calculate t when h=3, v=25, and theta=0,5,10,...,60
c) as theta Please solve the equation. 5(2q-1)=5+10q.

Thanks for all of your help!