Convert 3 kilograms to onces

What is the square root of 45? (step by step working plz)

Given abcd ac=38 and ae=3x+4 find the value of x

The input to the function is x and the output is y. write the function such that x can be a vector (use element-by-element operations). a) use the function to calculate y(-1.5) and y(5). b) use the function to make a plot of the function y(x) for -2 ≤ x ≤ 6.