How do I do linear equations?

a sample of 49 observations is taken from a normal population with a standard deviation of 10. the sample mean is 55. Determine the 99% confidence interval for the population mean.

The population of North Carolina is twice as large as the population of South Carolina Write the equation for the function

3/5 of 30 what is the number

It takes a hospital employee 24 minutes to drive from home to the hospital, a distance of 16 miles. What is the employee's average rate of speed?

A candy store sells chocolate for $5.94 per pound. The piece you want to buy weighs 0.23 pound. How much will it cost, to the nearest cent?

20% of a number is 17. Find the number.

Determine the angle of elevation if a 7-metre tree has a 12-metre shadow

Last month, Edwin had $2325.35 that he divided into two bank accounts. He deposited into a savings account. He deposited the rest into a checking account. How much money did Edwin deposit into his checking account? $

Simplify the following using scientific notation: (8.76 x 109) (6.52 x 10-3) / 13.27 x 105

Identify the vertex of g (x) = (x+10) ^2+2