I’ll mark brainlest! pls help! :/

Write an algebraic expression to match each statement a. four less than 8 times a number b. twice the difference of a number and six c. nine from a number squared

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.