What is the solution to this system of equations? 5x + 2y = 12 5x - 2y = 28

Find the value of ax 4 ; a = 2, x = 1. select one: a. 2 b. 4 c. 1 d. 8

Acompany that manufactures and sells guitars made changes in their product range. from the start they had 20 models. then they reduced the number of models to 15. as a result, the company enjoyed a 10% increase in turnover. - how much did the stock level change? in (%)

What is the point of inflection for the function f(x)=2cos4x on the interval (0, pi/2)