How many soution does this system have ?
Y=3/4x-5
-3x+4y=-20

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

Arecipe uses 2 cups of sugar to make 32 brownies. how many cups of sugar are needed to make 72 brownies?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?