Nikita uses a calculator to find 4 plus StartFraction 12 over 2 minus 4 EndFraction and gets a result of –8. Which statement best describes her work? Nikita determined the correct answer.
Nikita determined the result of 4 + 12 ÷ (2 + 4).
Nikita determined the result of 4 + 12 ÷ 2 – 4.
Nikita determined the result of (4 + 12) ÷ (2 – 4).

George is 187 cm tall. his son, ralph, is 142 cm tall. who casts the longer shadow. george when the sun is 65° above the horizon, or ralph when the sun is 56° above the horizon? how much longer? (nearest centimeter)

Scott’s bank account showed a balance of $750 on sunday. during the next five days, he made one deposit of $140 and numerous withdrawals of $180 each. let x represent the number of withdrawals that scott made. write an inequality that can be used to find the maximum number of withdrawals that scott could have made and maintain a balance of at least $100. do not use a dollar sign ($) in your response.

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?