Would you solve this by multiplying the second equation by 2 or -2 and why? 2x+6y=3 , x-3y=-1

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?