Find the sum of a 9-term geometric sequence when the first term is 4 and the last term is 1,024

In the diagram below, tan θ = sqrt 3. what is the value of m?

Which of these equations, when solved, gives a different value of x than the other three? a9.1 = -0.2x + 10 b10 = 9.1 + 0.2x c10 – 0.2x = 9.1 d9.1 – 10 = 0.2x

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.