The track team sold 40 t-shirts. Short sleeve t-shirts sold for $9.90 and long sleeve t-shirts sold for $12.75. In all, $421.65 was taken in.
How many short sleeve t-shirts were sold?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

How many heads would you expect if you flipped a coin twice? first, fill in the table below with the correct probabilities. hint: the sample space for flipping a coin twice is {hh, ht, th, tt}. a = b = c = f

Find the common ratio of the sequence. -4, 8, -16, 32, a: -12b: -2c: 12d: -1/-2