Three more than the product of a number and 7 equals 5

You eat 8 strawberries and your friend eats 12 strawberries from a bowl. there are 20 strawberries left. which equation and solution give the original number of strawberries?

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

If the discriminant if a quadratic equation is 4 which statement describes the roots?