Leroy made $12.50 during his first day at his lemonade stand, $7.25 on his second day, and $21.25 on his third day. On his fourth day he made 112% of the total amount he
made the previous three days combined. How much did he make on the fourth day?

After the seventh month of a 12-month loan: the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} = , and the denominator is: {(n) + (n + 1) + + (n + 11)} = . therefore, the fraction is numerator/denominator (to the nearest tenth) = %

Achemist has 200 ml of a 10% sucrose solution. she adds x ml of a 40% sucrose solution. the percent concentration, y, of the final mixture is given by the rational function: the chemist needs the concentration of the final mixture to be 30%. how many milliliters of the 40% solution should she add to the 10% solution to get this concentration?

The ratio of the measures of the three angles in a triangle is 2: 9: 4. find the measures of the angels