Identify major scientific figures and breakthroughs of the 20th century and assess their impact on contemporary life.

Give me the equations of two lines that have the same slope but are not parallel.

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28

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?