A runner runs a distance of 300 metres in a time of 60 seconds.
What is his average speed?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

Find the solution(s) to x^2-14+49=0