Point g is the centroid of triangle abc. ag = (5x + 4) units and gf = (3x – 1) units. what is af? 11 units 15 units 43 units 51 units

The circumference of a circle is 5 pi cm. what is the area of the circle?

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.

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?