Someone please answer all these for me!

Find the given elements if matrix d:

Given: x + y = 6. if xe (-15, -6, -1), then which of the following sets of ordered pairs are solutions? © {(-15, -21), (-6, -12), (-1, -7)} [(-15, 21), (-6, , 7)} {(-15, 21), (-6, 12), (-1, -7)}

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?