In the figure shown below, each angle of heptagon DEFGHIJ is expressed in terms of "S". What is the value of "x"? (Hint: S = 180(7-2)) E 9x-57x+15 F D 8x + 15 6x +35) J 13x - 35 11x - 25 H 6x I​

Bismuth-210 is an isotope that radioactively decays by about 13% each day, meaning 13% of the remaining bismuth-210 transforms into another atom (polonium-210 in this case) each day. if you begin with 233 mg of bismuth-210, how much remains after 8 days?

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?