Sam's car needs work. The mechanic charges $140 for parts plus $48 per hour for labor. The mechanic said the bill will be at least $300. What are the possible number of hours that the mechanic will work on Sam's car? Write an inequality to represent the given situation. (Use x to represent hours)
Solve your inequality. (Use x to represent hours)

Round your answer to the nearest tenth.

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels. ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0

$5400 is? invested, part of it at 11? % and part of it at 8? %. for a certain? year, the total yield is ? $522.00. how much was invested at each? rate?

(25 ! ) what does it mean for an equation to have no solution or infinitely many solutions?