exam Maths Puzzle Numerical Ability

John had a collection of 20 coins. The number of half dollars was 2 more than the number of quarters. Find the value of the collection.

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exam Other Question

Let R(x)=x^3-2x^2-7/x^2+1. What kind(s) of asymptotes does R(x) possess?

a. A single horizontal asymptote
b. A slant asymptote and a horizontal asymptote
c. A single slant asymptote
d. R(x) has no asymptotes If I increase my usual driving speed by 10 km/h, I can drive the 255 km to Nashviille in 24 minutes less than usual. How fast do I usually drive?