It's very simple mathematics, but i can't afford to get them wrong!

write each sentence as an algebraic equation.

sixteen is twice a number decreased by 9.

thirteen is five less than two times a number.

now write a sentence for the equation.
1=-2n+17

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)

Danielle has $127.02 in her account before making any transactions. over the course of a week, danielle makes the following transactions: transaction debit ($) credit ($) birthday check 75.00 night out 66.14 garage sale proceeds 121.58 charitable donation 42.25 doctor’s appointment 115.30 at the end of the week, how much money is in danielle’s account? a. $99.91 b. $27.11 c. $184.41 d. $142.16 select the best answer from the choices provided a b c d

Divide the following fractions 3/4 ÷ 2/3 1/2 8/9 9/8 2