On if: x = -3, y = 8, and z = -4. x + y + z*
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Which equations represents circles that have a diameter of 12 units and a center that lies on the y-axis? check all that apply

You have 12 balloons to blow up for your birthday party. you blow up 1/3, and your friend blows up 5 of them. what fraction of the baloons still need blowing up

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?