Evaluate the expression-5^2-4(6-8)^4

Determine which postulate or theorem can be used to prove that lmn =nmo

Why is it so easy to buy on impulse and overspend with a credit card? what could you do to counteract this tendency?

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.