PLEASE HELP!
solve for the unknown: (3x)^3=81^2x-5, 7^2x+1=49^3x-2,

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)

Which of the fallowing best completes the sequence 12,8,5, a) 1 b) 2 c)4 d)0

For what values of x is x2 + 2x = 24 true?