A pile of 104 copies of the book weighs 78 kg. Find: a) How many books weigh 30 kg?

b) The weight of 136 books.

The system of equations graphed below has how many solutions? y = 2x + 2

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)}

Solve the formula ax+ by = c for x.