Select the pair of equations whose graphs are perpendicular.
a.) 5x - 8y = 9
12x - 5y = 7
b.) 3x + 6y = 8
y = 3x - 8
c.) y = 2x - 7
x + 3y = 3
d.) 2y = -3x + 5
2x - 3y = 4

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

Beth makes batches of bluberry muffins and banna muffins. each batchis 6 muffins. she makes 2.5 batches of bluberry muffins. how many batches of bananna muffins should beth make if she wants to have a total of 60 muffins?

Solve 2x+y=3 x+y=5 in substitution method