The system of equations 2x+ky+5=0 and x-3y-9=0 has unique solution, when k equals to?​

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

Evaluate 3(a + b + c)squared for a = 2, b = 3, and c = 4. a. 54 b. 243 c.729 add solution .

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?