The perimeter of a triangle is 27 inches. the second side is 3 inches longer than the first side and the third side is twice as long as the first side. how long is each side?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?