Có 4 học sinh gồm 2 nam và 2 nữ đc xếp vào 2 dãy bàn đôis diện nhau a hỏi có bao nhiêu cách xếp
b hỏi có bao nhiêu cách xếp mà nam nữ ngồi đói diện nhau

The customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities

What ia the sum if the first 7 terms of the geometric series

Plzz ! if you were constructing a triangular frame, and you had wood in the length of 4 inches, 4 inches, and 7 inches, would it make a triangle? would you be able to create a frame from these pieces of wood? yes or no? = explain your mathematical thinking/show your work: