Leah put 21 white marbles. 31 black marbles. and 7 blue marbles in a bag. then her sister added 19 yellow marbles. write a number sentence to show the number of marbles in the bag

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?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Which of the following circles have their centers in the third quadrant? check all that apply.