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The sum of two numbers is 20 , and the 차이 between their squares is 40:Find the two numbers.Last year 90 schools participated in the State Spelling Bee. This year there were 20% more schools participating than last year. How many schools participated in the spelling bee this year?Suppose you draw one card from a standard 52-card deck. What is the probability that it is a red or a Jack?Mina is twice as old as Marko. The sum of their ages is 45.The sum of three numbers is 149. The third number is 4 times the second. The first number is 5 more than the second. What are the numbers?