Devin spent some of his birthday money at a game store. Now, he has \$ 7$7 less than his sister, Kaylee. Type an expression to represent the amount of money Devin has now. ​Let K represent the amount of money Kaylee has.

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part b .Kaylee has \$ 15, how much money does Devin have now?

Which system of linear inequalities is graphed? can somebody please

Which graph represents an even function?

Imogene invested $8,000 in a bank account that pays 8 percent simple interest at the end of each year. her friend invested the same amount in stocks where the growth of the investment is represented as 2,000 times the square root of 2 less than the time lapsed in years. if y1 and y2 represent the amount earned in dollars and t is the time lapsed in years, which system of equations correctly represents the situation?