someoneeThe first three terms of a geometric progression are 5k+6, kt6, k-2. find the positive value of k. hence, calculate the sum from the second term to sixth term.​

()1. how do you find range? 2.the following set of data is to be organized into a histogram. if there are to be five intervals on the graph, what should the length of each interval be? 30, 34, 23, 21, 27, 25, 29, 29, 25, 23, 32, 31

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)