Estimate this fraction, 7/12+5/6

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?

The sum of 5consecutive even numbers is 100. what is the first number in this sequence?

Study results indicate that the mean length of time people spend on a bus in a city is between 21.2 min and 24.5 min what is the study margin of the error?