Idon't know what i'm doing wrong but i can't get the right answer
you and 3 friends are going to great mountain park. the park has 3 water rides. the coaster, slide, and drop cost $5.50, $2.00, and $6.50, respectively. your group plans to ride each water ride once. how much change will you get back from a $100 bill?
$14
$22
$50
$44
i keep getting 58 because 5.50+2.00+6.50=14 and 14x3=42 and 100-42=58 what am i doing wrong

9. (y^-5)^10y^10 a. y^-60 b. y^60 c. y^-150 d. y^150 find the simplified form of each expression. 10. (4/7^5)^2 a.8/14^10 b.16/49^25 c.16/49y^10 d.8/14y^25 11. determine if the number 3.43 times 10^-6 is written in scientific notation. if not, explain. a. yes; the number is written scientific notation. b. no; the first factor is not a number between 1 and 10. c. no; it is not written as a number times a power of 10

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.

Simplify (a/b - b/a) times (a - a^2/a+b) a - a^2/a=b is a mixed number