7-6i

5-3i
plz help it's pre calculus and I don't get it​

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

Two sides of a triangle mesure 20cm and 30cm. what is the measure of the third side

I’m confused on how to work the pie charts