Find the cardinal number for the given set. A = {9, 12, 15,...,42}

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

()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

What is the standard form of -5x^2+2x^4-11+x^3+3x