Solve it please!

-2f - 7(-8f + 3)

If f(x)= 3x+6 which of the following is the inverse of f(x)

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21