exam Maths Puzzle Numerical Ability

please evaluate
f(x)=-5x+8 at f(-3)

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exam Other Question

What is the equation of the tangent line to y=x^2+2x-3 at (1,0)?

At what value of x does the tangent line to y=3x^2-24x+5 have slope of zero?

I would really be thankful if you could help me, thank you. Assume that there are 20,000 runners in the New York City Marathon. Each runner runs a distance of 26 miles. If you add together the total number of miles for all runners, how many