If a, b, c and d are in continued proportion, then prove that, (a^2+b^2) (b^2+ d^2) = (ab + cd)^2

34 cup. a serving of vegetable soup is 23 cup. the restaurant sold 20 servings of chicken noodle soup and 18 servings of vegetable soup. how many more cups of chicken noodle soup did they sell than cups of vegetable soup?

Write two subtraction equations that are equivalent to 5 + 12 = 17.

If the probability of an event happening is 65% then the probability this event does not occur?