15. A survey shows that 4 out of 10 students in the school would purchase a sweatshirt at a fund- raiser. If there are 1600 students in the school, how many students would you expect to buy a sweatshirt? Write and solve an equation.

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

You have 138.72 in your saving account u take out 45.23 and 18.00 you deposit 75.85 into your account

The price of a visit to the dentist is calculated according to the formula 50+100n50+100n where nn is the number of cavities the dentist finds. on your last visit to the dentist, 22 cavities were found. what was the cost of your visit?