exam Maths Puzzle Numerical Ability

AT 7 a.m. the temperature was -15 degrees F. By 1 p.m. the temp. increased by 18 degrees F. What was the temp. at 1 p.m.?

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exam Other Question

Find the domain of the following:
g(x)=5^2
g(x)=1n(x-4)
g(t)=log(t+2)
f(t)=5.5e^t
7+13(x+1)<3x