Marco buys 2 postcards during each day of vacation . How many days will Marco have to spend on vacation before he will have bought a total of 8 postcards?

What is the equation of a parabola y(x) that has a vertex at point (− 1/3 , 0.3) and passes through point (− 2/15 , − 1/2 ).

What is the effect on the graph of the parent function f(x) = x when f(x) is replaced with 3f(x)? a) shifts the line 3 units up b) shifts the line 3 units down c) increases the slope of the line by a factor of 3 d) decreases the slope of the line by a factor of 3

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?