1.The total cost of 2 baseballs and 4 footballs is $30.00. The total cost of 8 baseballs and 1 necklace is $37.50. Let b represent the number of baseballs and f represent the number of footballs. This situation can be represented by the
system of equations below.
2b + 4 = 30.00
8b+ f = 37.50

Classify the polygon by its number of sides. state whether the polygon appears to be regular or not regular. a. heptagon, regular b. heptagon, not regular c. octagon, regular d. octagon, not regular

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.

Find the multiplicative inverse of 8-12i