Find two numbers a+b is -4 and difference a-b is 4 what's your answer

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?

Plot a point at the y-intercept of the following function on the provided graph. 3y=-5x+7 20 points

What is the value of n in the equation -1/2(2n+4)+6=-9+4(2n+1)