Find the value of a^4-b^2/5
when a = -2 and b = -1.
help pl

Which graph corresponds to the function f(x) = x2 + 4x – 1?

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 (%)

Find the domain of the following expression: 1/(√x)-2