Evaluate the following expression when a = 5 and b = 1. Then, plot the resulting value on the provided number line. 12 + [2 - (4.22)] = 7 + 8

Will give brainliest series to sigma notation write the following series in sigma notation. 6+10+14+18+22+26+30 example image shown below.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?