Write the equation in terms of a rotated x'y'-system using the angle of rotation. Write the equation involving x' and y' in standard for. 19x² +244/3 xy - 5y2 - 527 = 0; 0 = 30

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

11. minitab software was used to find the lsrl for a study between x=age and y=days after arthroscopic shoulder surgery until an athlete could return to their sport. use the output to determine the prediction model and correlation between these two variables. predictor coef se coef t p constant -5.054 4.355 -1.16 0.279 age 0.2715 0.1427 1.9 0.094 r-sq = 31.16%

What are “like terms”? why can we only add like terms?