A restaurant must add 15% tax to the price of a meal. a Here are some bill totals before tax is added. Work out the bill after tax is added.
i $42.20 ii $19.50 iii $64.80

How do you determine whether a relationship represented as as graph is linear or nonlinear

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Find the volume of the solid obtained by rotating the region enclosed by the curves y=1x and y=7^-x about the x-axis. (use symbolic notation and fractions where needed.) volume =