Which values of a and b make the following equation true? (5x^7y^2)(-4x^4y^5)=-20x^ay^b

Using two or more complete sentences, describe how you can find a vector parallel to b=-2,3

Ineed i been stuck on this question since yesterday

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?