Which of the following parametric equations describe the same line? (a) x equals 2 plus t comma y equals 1 minus 5 t; negative infinity less than t less than infinity (b) x equals 2 plus 5 t comma y equals 1 minus 25 t; negative infinity less than t less than infinity (c) x equals 2 plus t Superscript 5 Baseline comma y equals 1 minus t Superscript 5; negative infinity less than t less than infinity

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

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.

Solve the following pair of equations for x and y: ax/b_ by /a= a +b; ax - by = 2ab