When would you use the quadratic formula to solve a quadratic equation? a ANY quadratic equation that is written in standard form b only when you have decimals in your quadratic equation c only when you have fractions in your quadratic equation d only when you have large numbers in your quadratic equation

Jeffery conducted a survey in his school and found that 30 of the 50 eighth grade students' favorite subject is mathematics. based on the results, jeffery concluded that out of the 200 students in his school, 120 students' favorite subject is mathematics. select the statement that is true about jeffery's conclusion. a. jeffery's conclusion is not valid because the sample was biased since only 200 students were surveyed. b. jeffery's conclusion is valid because the sample was random since all of the students were eighth grade students. c. jeffery's conclusion is valid because the sample was random. d. jeffery's conclusion is not valid because the sample was biased since all of the students were eighth grade students.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

What is the area of the original rectangle? 8 cm² 20 cm² 25 cm² 40 cm²