A store sells gift cards in preset amounts. You can purchase gift cards for $10 or $15. You have spent $340 on gift cards. Write an equation in standard form to represent this situation. What are three combinations of gift cards you could have purchased?Let x be the number of gift cards for $10, and let y be the number of gift cards for $15. Write an equation in standard form to represent this situation. 1

How do i do this? i don’t understand

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

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